By Dr Khushboo Sethia · Dermatologist, SkinWise Clinic Published Last reviewed
Psoriasis: understanding the flare beneath the surface
Patients come to us for psoriasis at very different stages. A first-year college student who just developed scaly red patches on the elbows and assumed it was eczema. A 40-year-old man who has lived with thick plaques on the scalp and knees for fifteen years and given up on treatment. A new mother whose long-quiet psoriasis flared during the third trimester and won’t calm down post-delivery.
What unites them is the experience of psoriasis as a cycling, persistent, sometimes shame-inducing condition that they’ve usually been treated for the wrong way — short steroid bursts, vague advice, no long-term plan, and the implicit suggestion that nothing more can really be done.
The picture in dermatology today is genuinely different. Psoriasis isn’t curable, but a meaningful proportion of patients can now achieve near-clear skin with the right treatment, and the long-term health implications of the disease are taken much more seriously. Here’s the honest version.
What psoriasis actually is
Psoriasis is a chronic immune-mediated condition in which the immune system signals the skin to grow much faster than normal. Skin cells that should mature and shed over 28 days mature in 3–4 days. The result is a build-up of thickened, scaly skin — the classic “plaque” of psoriasis — over an inflamed, red base.
A few things to anchor:
- It’s not infectious. Patients are sometimes treated as if they are. The condition is not transmissible by touch, shared towels, or contact.
- It’s not poor hygiene. It’s an immune disorder; the visible scale is dead skin built up faster than the body can shed it.
- It’s systemic. Psoriasis is associated with psoriatic arthritis, increased cardiovascular risk, metabolic syndrome, fatty liver, depression, and inflammatory bowel disease. Treating the skin alone misses half the picture.
- It’s chronic and cycling. Most patients have flares and remissions. Predicting them is hard. Recognising the triggers helps.
About 1–2% of the Indian population has psoriasis, with a roughly equal split between men and women. Onset peaks in two age windows: late teens to twenties, and again in the fifties.
The different patterns we see
The pattern of psoriasis affects both treatment and prognosis.
Plaque psoriasis — the most common form. Raised, red patches covered in silvery-white scale, typically on the elbows, knees, lower back, and scalp. Well-defined edges. Mild to severe.
Scalp psoriasis — thick scale on the scalp, often extending past the hairline behind the ears or onto the forehead. Frequently mistaken for severe dandruff. Itchy. Treatment is specifically tailored — most dandruff shampoos under-perform here.
Guttate psoriasis — small, drop-shaped red spots, often appearing suddenly across the trunk after a streptococcal throat infection. Most common in younger patients. Often self-limiting but can transition into chronic plaque psoriasis.
Inverse psoriasis — smooth, shiny, red patches in body folds (under the breasts, groin, axillae). The scale is missing because the fold rubs it off. Often misdiagnosed as fungal infection.
Pustular psoriasis — sterile pustules on a red base, either localised (palms and soles) or rarely generalised. The generalised form is a dermatology emergency.
Nail psoriasis — pitting, oil-spot discolouration, lifting of the nail plate. Frequently misdiagnosed as fungal nail. See our nail-infection guide.
Psoriatic arthritis — joint pain, stiffness, and swelling, sometimes preceding skin lesions, sometimes following them. Affects up to 30% of psoriasis patients. Worth screening for in every patient with skin disease, because early treatment prevents joint damage.
What triggers a flare
Triggers vary patient to patient, but the consistent ones in our practice:
- Stress — life events, exam season, work pressure. The single most-reported trigger.
- Infections — particularly streptococcal throat infection, which is a classic guttate trigger
- Skin injury (the Koebner phenomenon) — psoriasis often appears at sites of cuts, burns, tattoos, or even chronic scratching
- Cold, dry weather — the most common seasonal pattern in Bengaluru is winter worsening
- Medications — beta-blockers, lithium, antimalarials, sudden withdrawal of systemic steroids
- Smoking and excess alcohol — both worsen psoriasis and reduce treatment response
- Obesity and metabolic syndrome — bidirectional relationship; weight reduction often improves disease control
- Vitamin D deficiency — commonly co-exists; correcting it helps
Our approach to psoriasis at SkinWise
The plan depends on severity (how much skin is affected, how thick the plaques are, how much it’s impacting life), the pattern, and the patient’s broader health.
Step 1: confirm the diagnosis
Most psoriasis is clinically obvious. Atypical presentations — inverse psoriasis mistaken for fungus, palmoplantar psoriasis mistaken for eczema, nail psoriasis mistaken for onychomycosis — get a skin biopsy or further testing before treatment escalates.
Step 2: screen for the systemic picture
- Joint symptoms — early psoriatic arthritis screening
- Cardiovascular risk factors — blood pressure, lipids, glucose
- Liver function — for the systemic medications we may use
- Mood and quality-of-life impact — frequently underaddressed
Step 3: treat the skin, matched to severity
Mild to moderate disease — topical therapy
- Potent topical corticosteroids — first-line for plaques. Used in short courses with planned tapering.
- Vitamin D analogues (calcipotriol, calcitriol) — often paired with steroids
- Topical retinoids (tazarotene) — selected cases
- Salicylic acid — to lift scale and improve penetration of other topicals
- Coal tar preparations — useful adjunct in scalp and chronic plaque psoriasis
- Moisturisation — fragrance-free, generously, twice daily. Underrated.
Scalp psoriasis specifically
- Medicated shampoos (coal tar, ketoconazole, salicylic acid)
- Topical steroid solutions or foams for the scalp
- Vitamin D analogue solutions
- Overnight oils to soften thick scale before treatment
Moderate to severe disease — systemic therapy
When more than 10% of body surface is involved, when topicals aren’t controlling the disease, or when quality of life is significantly affected:
- Phototherapy — narrowband UVB, in supervised settings. Well-tolerated; many patients respond very well.
- Methotrexate — long-track-record systemic, requires monitoring
- Cyclosporine — fast-acting for severe flares; short-term use
- Acitretin — oral retinoid; useful in pustular and erythrodermic disease
- Apremilast — oral PDE4 inhibitor; favourable safety profile
Biologic therapy
A significant advance over the last decade. Targeted treatments that block specific immune pathways (TNF-alpha, IL-17, IL-23) and produce dramatic clearance in many patients:
- TNF inhibitors (adalimumab, infliximab, etanercept)
- IL-17 inhibitors (secukinumab, ixekizumab, brodalumab)
- IL-23 inhibitors (guselkumab, risankizumab, tildrakizumab)
These are prescription, monitored, and not cheap — but for moderate-to-severe psoriasis they’ve transformed what “control” looks like. We discuss them openly when they’re appropriate, with realistic talk about access, monitoring, and the duration of therapy.
Step 4: address triggers and broader health
- Smoking cessation and alcohol moderation
- Weight management — direct impact on disease severity
- Stress, sleep, mental health — explicitly addressed
- Vitamin D correction where indicated
- Treat associated streptococcal infection in guttate flares
- Refer to rheumatology if joint symptoms develop
What not to do
- Don’t scratch or pick at plaques. Scratching triggers the Koebner phenomenon — new psoriasis at sites of injury.
- Don’t stop systemic steroids abruptly. A short course of oral steroids for a flare followed by sudden withdrawal can produce a rebound and occasionally generalised pustular psoriasis. We avoid systemic steroids for psoriasis specifically for this reason in most cases.
- Don’t pursue random Ayurvedic “cures” that claim to fix psoriasis. Some are inert; some contain undisclosed steroids; few have evidence; none cure the condition. We have patients who lost years to these.
- Don’t mistake nail psoriasis for nail fungus and treat with antifungal courses. A specific differential we work through.
- Don’t ignore joint pain. Early psoriatic arthritis treatment prevents permanent joint damage; late treatment can’t reverse it.
- Don’t assume because the skin is clear the disease is gone. Psoriasis is chronic; maintenance and trigger management matter.
- Don’t under-moisturise. Generous, regular emollient use measurably reduces flare frequency and severity.
Frequently asked questions
Will it spread to the rest of my body? Possibly. Most patients have a relatively stable pattern; some experience progression. Treatment slows or reverses progression in most cases.
Will my children get it? There’s a genetic component. A child of one psoriasis parent has roughly 10–15% risk; two parents, 30–40%. Risk, not destiny — environmental factors matter.
Is it related to autoimmune disease? Psoriasis is itself an immune-mediated disease. Patients are at modestly increased risk of other immune-mediated conditions (Crohn’s, ulcerative colitis, certain forms of arthritis).
Can diet cure it? No diet cures psoriasis. Reducing alcohol, addressing obesity, and adequate vitamin D intake may improve control. Restrictive “anti-psoriasis” diets without evidence do more harm than good.
Is it true that sunlight helps? Moderate, controlled UV exposure — yes, particularly UVB. This is the basis for phototherapy. Sunbathing as a substitute risks burns and skin cancer, and we generally don’t recommend it.
Will biologics put me at risk of infection? There is a small increased risk of certain infections; we screen for tuberculosis, hepatitis, and other infections before starting, and monitor through treatment. For most patients with moderate-to-severe disease, the risk-benefit balance favours treatment.
Can I get a tattoo? We advise caution — tattoos can trigger Koebner-phenomenon psoriasis at the site. If the disease is well-controlled and the patient is set on a tattoo, we discuss timing and placement.
Is it lifelong? Yes, but lifelong does not mean unmanageable. Many patients achieve long periods of near-clear skin on the right treatment.
Where to go from here
If you have persistent red scaly patches, scalp scale that doesn’t respond to dandruff shampoos, or you’ve been treating something as eczema or fungal for months without improvement, book a consultation. Bring photos of the worst flares and a list of every treatment you’ve tried.
If you already have a psoriasis diagnosis but you’re tired of short-term steroid creams and want a real long-term plan — that’s exactly the conversation to have.
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