Overview
Psoriasis is a chronic inflammatory condition that mainly affects the skin, but it can also affect the nails and joints. It often appears as well-defined patches with scaling that may look red, pink, purple, or brown depending on skin tone. Symptoms may improve for a time and then flare again. The condition can range from mild to widespread and may affect daily comfort, sleep, and confidence.
Key Symptoms
Common symptoms include raised or thickened patches of skin with silvery or flaky scale, itching, burning, soreness, or cracked skin that may bleed. The scalp, elbows, knees, lower back, hands, feet, and skin folds can be affected. Nails may become pitted, thickened, crumbly, or separate from the nail bed. Some people have joint stiffness, pain, or swelling, which may be a sign of psoriatic arthritis.
Causes and Risk Factors
Psoriasis is linked to an overactive immune response that speeds up skin cell growth. It tends to run in families, showing that genes can play a role. Flare-ups may be triggered by stress, throat infections or other illnesses, skin injury such as cuts or sunburn, smoking, alcohol use, cold weather, and some medicines. Obesity is also linked with more severe disease in some people.
Who Is Affected
Psoriasis can affect children and adults of any sex, ethnicity, or skin color. It may look different on darker skin tones, where patches can appear purple, brown, or darker than surrounding skin rather than bright red. People with a family history are more likely to develop it. Those with psoriasis may also have a higher chance of other inflammatory conditions, including psoriatic arthritis.
Diagnosis and Tests
A healthcare professional often diagnoses psoriasis by examining the skin, scalp, or nails and asking about symptoms and family history. Sometimes a small skin sample may be taken to help rule out other conditions. If there is joint pain, swelling, or morning stiffness, further evaluation may be needed to check for psoriatic arthritis. Getting the right diagnosis matters because several other skin conditions can look similar.
Treatment Categories
Treatment depends on where psoriasis is located, how much of the body is affected, how severe symptoms are, and whether joints are involved. Categories of treatment may include moisturizers, medicated creams or ointments, light-based treatment supervised by a clinician, and medicines that work throughout the body for more severe disease. Treatment plans may need adjusting over time as symptoms change. Joint symptoms should be assessed promptly because untreated inflammation can lead to lasting joint damage.
Living With It
Psoriasis can affect sleep, work, movement, relationships, and emotional well-being. Visible skin changes may cause embarrassment or stigma, even though the condition is not contagious. Keeping a record of flare triggers, symptoms, and treatments can help with follow-up visits. Support from clinicians, family, peer groups, or mental health professionals may also help.
Diet and Lifestyle
Skin care habits such as regular moisturizing and avoiding harsh scratching may help reduce discomfort. Managing stress, not smoking, limiting alcohol, and maintaining a weight range that supports overall health may help some people have fewer or less severe flares. Protecting the skin from injury and sunburn can also be useful. Diet changes alone do not replace medical treatment, but a balanced eating pattern supports general health.
When to Seek Medical Care
Seek medical care if you have persistent scaly or itchy skin patches, nail changes, symptoms that are spreading, or skin problems that are affecting sleep, daily activities, or emotional health. Make an appointment sooner if you develop joint pain, swelling, or stiffness, especially in the morning. Also seek care if your treatment is not helping, the diagnosis is uncertain, or the skin becomes very painful or shows signs of infection such as increasing redness, warmth, pus, or fever.