Causes and Risk Factors
Psoriasis develops when the immune system mistakenly attacks healthy skin, speeding up skin cell turnover from about a month to just a few days. Several factors influence who develops psoriasis and when it flares:- Genetics: Having a parent or sibling with psoriasis significantly increases your risk of developing it.
- Infections: Strep throat and other infections can trigger a first outbreak or a flare, particularly in children and young adults.
- Skin injury: Cuts, scrapes, sunburns, and even tattoos can spark new plaques at the site of injury, a response called the Koebner phenomenon.
- Stress and lifestyle: Emotional stress, smoking, heavy alcohol use, and cold, dry weather are common flare triggers.
- Medications: Certain drugs, including lithium and some blood pressure medicines, can bring out or worsen psoriasis.
Symptoms
Psoriasis looks different from person to person, but common signs include:- Raised plaques with silvery scale: Most often on the elbows, knees, scalp, and lower back, though any skin surface can be involved.
- Itching, burning, or soreness: Discomfort ranges from mild to intense, and scratching can worsen the plaques.
- Nail changes: Pitting, thickening, discoloration, or lifting of the fingernails and toenails.
- Different patterns: Plaque psoriasis is the most common form, but guttate psoriasis causes small, drop-shaped spots after infections, inverse psoriasis affects skin folds, and some people have mainly scalp or nail disease.
- Joint pain and stiffness: Up to one in three people with psoriasis develops psoriatic arthritis, a form of inflammatory arthritis that can damage joints if untreated.
Diagnosis
Most psoriasis is diagnosed by its appearance during a careful skin examination, including a look at the scalp and nails. Occasionally a small skin biopsy is needed to distinguish it from look-alike rashes such as dermatitis or a fungal infection. Your clinician will also gauge severity by estimating how much of the body surface is involved and asking how symptoms affect sleep, work, and mood, since those answers guide treatment choices.Treatment
Treatment is tailored to how much skin is involved and how much psoriasis affects your daily life:- Topical therapy: Corticosteroid creams and vitamin D analog ointments are the usual first step for limited plaques.
- Phototherapy: Carefully dosed ultraviolet light treatments delivered in a medical setting can calm widespread disease.
- Oral medications: Newer pills such as apremilast and deucravacitinib quiet the immune signals that drive plaque formation.
- Biologic medications: Injectable agents that block specific immune pathways — including secukinumab, ixekizumab, brodalumab, guselkumab, risankizumab, and tildrakizumab — can clear even severe psoriasis for many patients.
Complications
Psoriasis is more than a skin condition. It is associated with higher rates of coronary artery disease, diabetes, obesity, and depression, so people with psoriasis benefit from regular preventive care, blood pressure checks, and cholesterol screening. Persistent itch can also disturb sleep and wear on mental health, which is worth discussing openly at visits. Living well with psoriasis means treating the skin and protecting overall health. The internal-medicine team at Zimmer Medical Group can manage your therapy, monitor for related conditions, and coordinate dermatology referrals when advanced treatment is needed — schedule a visit to get a flare under control.Living With Psoriasis
Psoriasis is now a condition most people can clear rather than merely manage, but the outcome depends on details the description above does not cover: how topical steroids are used, what quietly triggers flares, and when to stop adding creams and start systemic treatment.
Using topical steroids so they work and do not harm
A potent steroid ointment applied once or twice daily clears most plaques within a few weeks; it is then stopped or reduced to weekend use, with a vitamin D analog or moisturizer on other days, because continuous use thins the skin and loses effect. The face, groin, and skin folds take only mild steroids such as hydrocortisone or a non-steroid alternative. Ointments outperform creams on thick plaques, and a medicated shampoo or a steroid solution left on overnight is what actually reaches scalp plaques.
Sun helps, sunburn does not
Florida sunlight is real treatment; short, regular exposures thin plaques, which is why many people improve in summer. A burn does the opposite: any skin injury, including sunburn, tattoos, and scratching, produces new plaques at that site. Brief exposure with sunscreen on unaffected skin is the balance, and our Florida sun safety guide and skin cancer screening article cover the other side of the trade. Sweat and friction in the heat drive inverse psoriasis in the folds, which is often mistaken for a fungal infection.
What quietly makes it worse
Strep throat, smoking, heavy alcohol, weight gain, and stress each trigger flares. So do several common medications: lithium, beta-blockers such as metoprolol, hydroxychloroquine, and, most importantly, oral prednisone, which clears psoriasis briefly and then rebounds it, sometimes into a dangerous pustular or whole-body form. Rapidly spreading redness over most of the body with chills, or sheets of pustules, needs same-day care.
When to move beyond creams
Plaques covering more than about ten palm-sized areas, or any psoriasis on the hands, feet, face, genitals, or nails that limits daily life, warrants systemic treatment rather than more topical steroids. Methotrexate once weekly with folic acid remains effective and inexpensive; apremilast and deucravacitinib are pills with little monitoring burden; and biologics such as secukinumab, guselkumab, and risankizumab clear the skin completely for most. Before a biologic, tuberculosis and hepatitis B are screened for and vaccines brought current. Our dermatologic team manages that workup with dermatology.
The joints, the heart, and the mood
Morning stiffness, a swollen finger or toe, or heel pain in someone with psoriasis is psoriatic arthritis until proven otherwise, and joint damage is preventable only when it is caught early. The same inflammation raises the risk of coronary artery disease, metabolic syndrome, and fatty liver disease, so blood pressure, cholesterol, glucose, and weight are checked yearly, and depression is asked about rather than waited for. NIAMS and the National Psoriasis Foundation publish patient guidance on treatment choices.
If your psoriasis is controlled only while you keep applying steroids, or you have joint pain along with it, schedule a visit.