Psoriasis: Symptoms, Triggers and Treatment Options

Psoriasis is a long term, immune mediated condition in which skin cells are produced far faster than normal, building up into thick, well defined, scaly patches called plaques, usually on the scalp, elbows, knees and lower back. It is not contagious and has no permanent cure, but with the right treatment most people can keep it well controlled.

Indian hospital based studies estimate that psoriasis affects somewhere between about 0.4 and 2.8 percent of adults, and it is a common reason for dermatology visits. Many patients arrive after years of trying oils, diets and unlabelled tablets. This guide explains what psoriasis is and the options that genuinely help.

What causes psoriasis?

Psoriasis results from an overactive immune response that signals skin cells to multiply rapidly. Normally skin renews itself over about a month. In psoriasis, this happens in days, so cells pile up as scale.

Contributing factors include:

• Genes. Psoriasis often runs in families.
• Immune pathways involving specific signalling molecules, which is what modern biologic treatments target.
• Environmental triggers that can start or worsen it in people who are prone.

What triggers psoriasis flares?

Common triggers include:

• Throat infections (especially for guttate psoriasis in young people)
• Stress
• Skin injury, scratching, tattoos or friction, where new plaques can appear (the Koebner phenomenon)
• Smoking and alcohol
• Excess weight
• Cold, dry weather, while moderate sunlight often helps
• Certain medicines, such as some blood pressure tablets, lithium and antimalarials
• Stopping oral or injected steroids, which can cause severe rebound flares

That last point is important in India, where steroid injections or tablets are sometimes given for quick relief. They may clear the skin for a short time, then cause a much worse flare, sometimes with pus filled (pustular) or whole body (erythrodermic) psoriasis.

What are the symptoms and types of psoriasis?

Type	What it looks like	Common sites
Plaque psoriasis	Thick, raised, scaly plaques, red or violet to dark brown on brown skin	Scalp, elbows, knees, lower back
Scalp psoriasis	Thick, adherent scale extending past the hairline	Scalp, behind ears
Guttate psoriasis	Many small drop shaped spots	Trunk and limbs, often after a throat infection
Inverse psoriasis	Smooth, shiny patches without much scale	Groin, armpits, under breasts
Palmoplantar psoriasis	Thick, cracked skin or pustules	Palms and soles
Nail psoriasis	Pits, discolouration, thickening, lifting	Fingernails and toenails
Pustular or erythrodermic	Widespread pustules or redness over most of the body	Whole body, needs urgent care

On Indian skin, plaques may look darker or more violet than red, and after healing they often leave dark or light marks that fade slowly.

Itching is common, despite the old belief that psoriasis does not itch.

Could it be something else?

Scaly patches can also come from eczema, fungal infection, seborrheic dermatitis and other conditions. Ringworm in particular is often confused with psoriasis in India, and the reverse happens too. Using combination steroid and antifungal creams makes both harder to diagnose. See our guides on fungal infections and ringworm and eczema.

Is psoriasis linked to other health problems?

Yes, and this is why psoriasis is treated as more than a skin condition. People with psoriasis, especially moderate to severe disease, have a higher risk of:

• Psoriatic arthritis: joint pain, morning stiffness, sausage shaped fingers or toes, heel pain or back pain.
• Metabolic syndrome: obesity, diabetes, high blood pressure and abnormal cholesterol.
• Heart disease.
• Fatty liver disease.
• Depression and anxiety.

Your dermatologist may ask about joints and suggest checks for blood sugar, blood pressure and cholesterol.

How is psoriasis treated?

Treatment depends on the type, the area affected, how it affects your life, and other health conditions. Your dermatologist may consider:

Topical treatments (for limited psoriasis)

• Prescription corticosteroid creams or lotions, used in a planned way
• Vitamin D analogue creams, often combined with steroids
• Calcineurin inhibitors for the face and folds
• Coal tar, salicylic acid and keratolytic preparations to soften scale
• Medicated shampoos for scalp psoriasis

Thick moisturisers, applied generously after bathing, support all of these.

Phototherapy

Narrowband UVB phototherapy, given in a clinic two to three times a week, helps many people with widespread psoriasis. Results take several weeks.

Oral medicines

For moderate to severe psoriasis or psoriatic arthritis, options include methotrexate, ciclosporin, acitretin and apremilast. Each has specific benefits and risks and needs blood test monitoring. Some, such as acitretin and methotrexate, require strict pregnancy precautions.

Biologics and newer targeted medicines

Biologic injections that block specific immune signals have transformed treatment of moderate to severe psoriasis. Biosimilar versions of some biologics are now available in India, which has improved access. Screening for infections such as tuberculosis is required before starting.

How do I manage scalp psoriasis?

Scalp psoriasis is common and often mistaken for severe dandruff. Thick, stuck on scale can itch and flake onto clothes, and some people notice temporary hair shedding during flares. Helpful steps include:

• Softening the scale before washing with an oil or a salicylic acid preparation your dermatologist suggests, then washing it out the same day.
• Using medicated shampoos, such as coal tar or prescribed options, left on for a few minutes.
• Combing scale out gently rather than picking or scratching, which can trigger new plaques.
• Applying prescribed scalp lotions or gels as directed.

Hair usually regrows once the scalp settles. If your flaking is greasy and yellow rather than thick and silvery, read our guide on dandruff and seborrheic dermatitis, since the two can overlap.

Can lifestyle changes help?

Lifestyle changes support medical treatment, they do not replace it. Those with the best evidence:

• Weight loss if you are overweight, which can improve psoriasis and how well treatments work.
• Stopping smoking.
• Limiting alcohol, which also matters if you take methotrexate.
• Regular moisturising and gentle bathing with lukewarm water.
• Avoiding scratching and picking plaques.
• Managing stress through sleep, exercise and support.

There is no evidence that a specific food combination causes or cures psoriasis.

What should I avoid?

• Do not take unlabelled tablets, so called herbal capsules, or steroid injections promising a quick cure. Some have been found to contain hidden steroids.
• Do not use over the counter steroid creams on the face, folds or large areas without a prescription. See why topical steroid misuse is dangerous.
• Do not stop prescribed systemic treatment suddenly without speaking to your doctor.

When to see a dermatologist

See a dermatologist if:

• You have scaly patches that are not settling, to confirm the diagnosis.
• Psoriasis affects your scalp, face, palms, soles, nails or genitals, or covers a large area.
• You have joint pain, stiffness or swollen fingers or toes.
• Treatments are not working, or you are worried about side effects.
• Your skin suddenly becomes red all over, or develops many pustules with fever. This needs urgent care.
• Psoriasis is affecting your sleep, work, relationships or mood.

Psoriasis is very treatable with a long term plan. Dr. Maria offers online consultations to review your skin, previous treatments and reports, and help you choose an approach that suits you.