Shingles (Herpes Zoster): Symptoms, Causes, and the Shingrix Vaccine in Noida

Most patients who come to Felix Hospital's dermatology or internal medicine OPD with shingles share the same story. It started with a strange burning or tingling on one side of the body  they assumed it was a muscle pull, or a nerve problem, or just stress. A few days later, a painful rash appeared. By then, the window for the most effective antiviral treatment had already started to close.

Shingles is one of those conditions that catches people off guard precisely because its early symptoms are so easily mistaken for something else. And in India, where more than 90% of adults above 40 have the varicella-zoster virus dormant in their body and are therefore vulnerable to shingles, this is not a rare or distant concern. According to the Indian Council of Medical Research, the incidence of shingles in India is around 3.3 cases per 1000 people per year  translating to approximately 4.5 million cases annually.

Understanding shingles  what it is, how it presents, when to seek treatment, and how to prevent it  can mean the difference between a brief, manageable illness and months of debilitating nerve pain.

What Is Shingles (Herpes Zoster)?

Shingles is a painful rash caused by the reactivation of the varicella-zoster virus  the same virus that causes chickenpox. Anyone who has had chickenpox can develop shingles, although it is more common in adults over 50 years of age. The main symptom is a rash that appears on one side of the body, often as a single stripe of blisters.

Following primary varicella-zoster virus infection  typically chickenpox in childhood  the virus enters the sensory nerves and travels along the nerve to the sensory dorsal root ganglia, where it establishes a permanent latency. Reactivation of the latent virus leads to the clinical manifestations of shingles and is associated with immune senescence or suppression of the immune system.

In simple terms: once you have had chickenpox, the virus never leaves your body. It retreats into your nerve tissue and waits  sometimes for decades. When your immune system weakens due to age, illness, medication, or stress  the virus seizes the opportunity to reactivate. The result is shingles.

Varicella-zoster is part of a group of viruses called herpes viruses  the same group that includes the viruses that cause cold sores and genital herpes. However, the virus that causes chickenpox and shingles is not the same virus that causes cold sores or genital herpes, which is a sexually transmitted infection. This is a common source of confusion and unnecessary stigma  shingles is not a sexually transmitted disease.

Causes of Shingles

The cause of shingles is always the same virus  varicella-zoster. But what triggers the reactivation after years of dormancy is a weakening of the immune system's ability to keep it suppressed.

The reason for shingles is unclear in many cases. It may be due to lowered immunity to infections as people get older. Shingles is more common in older adults and in people who have weakened immune systems. After the age of 50, the immune system's surveillance of dormant viruses naturally declines  which is why the risk of shingles increases progressively with age, and why adults above 50 are the primary candidates for vaccination.

The risk of shingles and serious complications also increases if you have medical conditions that keep your immune system from working properly  such as certain cancers like leukaemia and lymphoma, and HIV infection  or if you take drugs that suppress immune function, like steroids and drugs given after an organ transplant.

Adults above 50 years of age and those suffering from chronic conditions such as diabetes, heart disease, and kidney disease are at an increased risk of developing shingles because of weakened immunity. In Felix Hospital's clinical practice, we see shingles disproportionately in patients with poorly controlled diabetes  where chronic high blood sugar suppresses immune function at the cellular level.

Severe physical stress major surgery, serious illness, significant trauma can also temporarily suppress immune function enough to allow viral reactivation. Prolonged psychological stress has been associated with shingles episodes as well, though the mechanism is less direct.

Is it Shingles? The Silent Warning Signs Before the Rash

Understanding the full symptom timeline of shingles is essential  because the most effective treatment window is in the first 72 hours, and that window is often missed because early symptoms are not recognised as shingles.

The 3 Phases of Shingles: What to Expect

Phase 1  The Prodrome (Days 1–5): Burning, tingling, or "electric" pain. No rash yet. This is the best time to see a doctor.

This is the stage at which shingles is most commonly misdiagnosed  or dismissed entirely. People with herpes zoster can have pain, itching, or tingling in the area where the rash will develop. A person can experience headache, photophobia (sensitivity to bright light), and malaise several days before the rash appears.

The pain at this stage is often described as a burning or shooting pain along one side of the chest, abdomen, back, or face; extreme sensitivity to touch where even clothing against the skin feels uncomfortable; a deep, aching discomfort that resembles a pulled muscle or pinched nerve; or itching and tingling in a localised band of skin.

At Felix Hospital, patients in this prodromal phase who come in are assessed for shingles based on the characteristic dermatomal distribution of symptoms  even before the rash appears. Starting antiviral treatment at this stage produces the best outcomes.

Phase 2  The Active Rash: A "stripe" of blisters that stays on one side of the body.

The rash most commonly appears on the trunk along a thoracic dermatome or on the face. It usually does not cross the body's midline. The rash develops into clusters of vesicles  fluid-filled blisters. New vesicles continue to form over 3 to 5 days, and the rash progressively dries and scabs over.

The appearance is characteristic: a band or stripe of red, inflamed skin that follows the path of a nerve  wrapping around one side of the chest, abdomen, or back like a half-belt. The blisters are filled with clear fluid, similar in appearance to chickenpox blisters, and are intensely painful. This unilateral, dermatomal distribution is the clinical hallmark that distinguishes shingles from other rash-producing conditions.

Phase 3 The Healing Phase: Blisters crust over, but nerve pain may continue.

The rash typically clears up within 2 to 4 weeks. The blisters dry out, crust over, and heal  leaving behind either clear skin or, in some patients, areas of permanent discolouration or scarring. The pain, however, does not always resolve with the rash. And this is where shingles becomes something far more serious than a skin condition.

You can spread the varicella-zoster virus to people who have never had chickenpox and have not been vaccinated. You are contagious until all the sores have crusted over. An important clarification: you cannot get shingles from someone who has shingles. However, you can get chickenpox from someone who has shingles if you have never had chickenpox or never received the chickenpox vaccine  and you could then develop shingles later in life.

Shingles vs. Chickenpox: What is the Difference?

Both shingles and chickenpox are caused by the same virus  varicella-zoster. But they are fundamentally different diseases representing two different stages of the same viral infection.

Chickenpox is the primary infection typically experienced in childhood where the virus first enters the body and causes a widespread, itchy rash across the whole body accompanied by fever and fatigue. Once chickenpox resolves, the virus does not leave. It retreats silently into the sensory nerve ganglia and remains dormant, sometimes for decades.

Shingles is a reactivation of that same dormant virus  not a new infection. It does not spread across the whole body like chickenpox. Instead, it follows a single nerve pathway, producing a localised, one-sided stripe of blisters that is far more painful than chickenpox and carries the risk of long-term nerve damage. Chickenpox spreads easily from person to person through the air. Shingles, by contrast, is not "caught" from another person  it emerges from within, triggered by a weakening of the immune system that allows the virus to reactivate after years of dormancy.

Complications: Why You Shouldn't "Wait and See"

Shingles is not just a skin condition. In a significant proportion of patients  particularly those who are older, immunocompromised, or who did not receive early antiviral treatment  it causes complications that can be severe, disabling, and long-lasting.

Postherpetic Neuralgia (PHN): Permanent nerve pain

The most common complication of shingles is nerve pain that does not go away when the rash does. PHN occurs in 5–25% of all shingles cases depending on the patient's age. The pain  often described as burning, stabbing, or electric shock-like  occurs in the area where the original shingles rash appeared, even though the skin has healed completely. The risk of developing postherpetic neuralgia is 30% higher and the pain is more debilitating in adults above 50. This pain can cause psychological disturbances, disrupt sleep, make clothing contact unbearable, and in severe cases make patients unable to work or carry out daily activities.

Ocular Shingles: A medical emergency that can lead to blindness

When shingles affects the trigeminal nerve  the nerve that supplies the forehead, eye, and nose  it can involve the eye directly, causing eye irritation, corneal ulcers, or retinal inflammation, resulting in blurred vision, light sensitivity, and in severe cases, blindness. Any patient with shingles involving the forehead or the tip of the nose should be evaluated by an ophthalmologist immediately, as corneal involvement can develop rapidly.

Ramsay Hunt Syndrome: Facial paralysis and hearing loss

When the varicella-zoster virus reactivates in the facial nerve, it causes Ramsay Hunt Syndrome  a triad of painful ear blisters, facial paralysis on the same side, and hearing loss. Early antiviral and corticosteroid treatment significantly improves outcomes, but some patients are left with permanent facial weakness or hearing impairment.

Additional complications include bacterial superinfection of the blisters if not kept clean, and in immunocompromised patients, neurological involvement causing encephalitis, meningitis, or myelitis  rare but serious conditions requiring hospitalisation and intravenous antiviral therapy.

Treatment: The "72-Hour Rule"

There is no cure for shingles  the virus remains in the nervous system permanently. But treatment started early significantly reduces the severity, duration, and complication risk of the illness.

Note: Antiviral medications (like Valacyclovir) are most effective when started within 72 hours of the first blister.

Antivirals: To stop the virus from spreading

Antiviral drugs are the cornerstone of shingles treatment. The three antivirals used are acyclovir (requires five doses daily), valacyclovir (three times daily, better bioavailability), and famciclovir (three times daily). Starting treatment at 48 hours or earlier produces the best reduction in pain severity, rash duration, and  most importantly  the risk of postherpetic neuralgia. After 72 hours, the benefit diminishes significantly. If a patient presents to Felix Hospital with burning pain along a dermatomal distribution  even before the rash has appeared  antivirals can be started immediately for the best possible outcome.

Pain Management: Nerve-stabilising medications (Gabapentin/Pregabalin).

Shingles pain is often severe, and standard painkillers like paracetamol are frequently insufficient. For mild to moderate pain, paracetamol and NSAIDs provide baseline control. For moderate to severe pain, gabapentin or pregabalin  nerve-stabilising medications that reduce the burning, shooting quality of neuropathic pain  are particularly important both during the acute phase and for PHN. Tricyclic antidepressants, particularly amitriptyline at low doses, modulate pain signalling independently of their antidepressant effect. Topical agents including lidocaine patches, capsaicin cream, and calamine lotion provide additional localised relief.

Oral corticosteroids  typically prednisolone  are sometimes prescribed alongside antivirals in patients with moderate to severe shingles, particularly when facial nerve or eye involvement is present.

Wound Care: Keeping the area clean to prevent scarring.

During the blistering phase, keeping the rash clean and dry reduces the risk of bacterial superinfection. Loose cotton clothing over the affected area minimises friction and discomfort. Do not burst the blisters  this increases infection risk and may worsen scarring. Cool compresses can provide temporary relief from itching and burning.

For postherpetic neuralgia that persists after the rash has healed, Felix Hospital offers targeted management including gabapentin or pregabalin, topical lidocaine patches, capsaicin 8% patch for refractory cases, and pain psychology support for patients with significant mood impact. PHN is a condition that many patients manage inadequately because they do not realise it is treatable beyond simple painkillers. If you or a family member is experiencing persistent burning pain months after a shingles episode, please seek specialist review at Felix Hospital.

Prevention: The Shingrix Vaccine at Felix Hospital

Prevention of shingles  and particularly its most feared complication, postherpetic neuralgia  is now possible through vaccination. This is one of the most significant developments in adult preventive medicine in the past decade.

Who needs it? Adults 50+ and immunocompromised individuals

GlaxoSmithKline's Shingrix (Zoster Vaccine Recombinant, Adjuvanted) is approved in India for the prevention of shingles and postherpetic neuralgia in adults aged 50 years and above. Because Shingrix is a non-live vaccine, it can also be offered to those who are immunocompromised and/or immunosuppressed  patients for whom the older live vaccine Zostavax is not appropriate.

How effective is it? Over 90% effective at preventing both Shingles and PHN.

In adults 50 to 69 years old with healthy immune systems, Shingrix was 97% effective in preventing shingles. In adults 70 years and older, it was 91% effective. In adults 50 years and older, Shingrix was 91% effective in preventing postherpetic neuralgia. Immunity remained high for at least 7 years after vaccination in adults 70 and older. By comparison, the older Zostavax vaccine is only about 51% effective  making Shingrix the strongly preferred choice at Felix Hospital.

Dosing: Two doses, 2–6 months apart.

Adults 50 years and older should get two doses of Shingrix, separated by 2 to 6 months. Shingrix can provide at least a decade of protection against shingles after the initial vaccination. The vaccine can also be given to someone who has already had shingles  to reduce the risk of a future episode, as shingles can recur, particularly in immunocompromised individuals.

The shingles vaccine typically costs between ₹3,500 and ₹5,000 per dose in India, with the complete two-dose course costing approximately ₹7,000 to ₹10,000. Some health insurance plans in India may cover part of the vaccination cost. Contact Felix Hospital at +91 9667064100 to confirm availability and current pricing.

Additional prevention measures include keeping diabetes, hypertension, and other chronic illnesses well-controlled to support immune function; managing prolonged stress; and ensuring children receive the chickenpox vaccine, which reduces the likelihood of shingles later in life.

When to See a Doctor for Shingles

Shingles is a time-sensitive condition. Come to Felix Hospital immediately call +91 9667064100 or present to our emergency or OPD without delay  if you experience pain, burning, or tingling on one side of your body even without a rash; a blistering rash on one side of the face or body following a stripe-like pattern; any rash or pain involving the eye, eyelid, forehead, or tip of the nose; ear pain, blisters in or around the ear, or facial weakness; fever, confusion, or severe headache alongside a shingles rash; persistent burning or shooting pain months after a previous shingles episode; or any shingles symptoms if you are immunocompromised.

Do not adopt a "wait and see" approach. The earlier you act, the better the outcome.

Conclusion

Shingles is not simply a rash. It is a viral nerve condition that causes some of the most intense pain described in clinical medicine  and in a significant proportion of patients, that pain outlasts the rash by months or years.

The good news is that we now have more tools than ever before to manage shingles effectively: early antiviral treatment that reduces severity and complication risk; targeted therapies for postherpetic neuralgia; and a highly effective vaccine that prevents the disease before it can start.

At Felix Hospital, Sector 137, Noida, our dermatology and internal medicine teams see and manage shingles at every stage from the burning prodrome to the acute blistering rash to the chronic nerve pain of PHN. We also offer the Shingrix vaccination for adults 50 and above, with a consultation to assess your individual risk and vaccination suitability.

If you or a family member is experiencing any symptom that might be shingles  or if you are over 50 and have not discussed shingles vaccination with your doctor  call +91 9667064100 today.