Psoriasis is a common skin condition that speeds up the life cycle of skin cells. It causes cells to build up rapidly on the surface of the skin. The extra skin cells form scales and red patches that are itchy and sometimes painful.
Psoriasis is a chronic disease that often comes and goes. The main goal of treatment is to stop the skin cells from growing so quickly.
There is no cure for psoriasis, but you can manage symptoms. Lifestyle measures, such as moisturizing, quitting smoking and managing stress, may help.
Psoriasis care at Mayo Clinic
Psoriasis signs and symptoms are different for everyone. Common signs and symptoms include:
Psoriasis patches can range from a few spots of dandruff-like scaling to major eruptions that cover large areas.
Most types of psoriasis go through cycles, flaring for a few weeks or months, then subsiding for a time or even going into complete remission.
There are several types of psoriasis. These include:
Guttate psoriasis. This type primarily affects young adults and children. It’s usually triggered by a bacterial infection such as strep throat. It’s marked by small, water-drop-shaped, scaling lesions on your trunk, arms, legs and scalp.
The lesions are covered by a fine scale and aren’t as thick as typical plaques are. You may have a single outbreak that goes away on its own, or you may have repeated episodes.
Pustular psoriasis. This uncommon form of psoriasis can occur in widespread patches (generalized pustular psoriasis) or in smaller areas on your hands, feet or fingertips.
It generally develops quickly, with pus-filled blisters appearing just hours after your skin becomes red and tender. The blisters may come and go frequently. Generalized pustular psoriasis can also cause fever, chills, severe itching and diarrhea.
If you suspect that you may have psoriasis, see your doctor for an examination. Also, talk to your doctor if your psoriasis:
Seek medical advice if your signs and symptoms worsen or don’t improve with treatment. You may need a different medication or a combination of treatments to manage the psoriasis.
Viven Williams: Your fingernails are clues to your overall health. Many people develop lines or ridges from the cuticle to the tip.
Rachel Miest, M.D.: Those are actually completely fine and just a part of normal aging.
Viven Williams: But Dr. Rachel Miest says there are other nail changes you should not ignore that may indicate
Rachel Miest, M.D.: liver problems, kidney problems, nutritional deficiencies …
Viven Williams: and other issues. Here are six examples: No. 1 is pitting. This could be a sign of psoriasis. Two is clubbing. Clubbing happens when your oxygen is low and could be a sign of lung issues. Three is spooning. It can happen if you have iron-deficient anemia or liver disease. Four is called “a Beau’s line.” It’s a horizontal line that indicates a previous injury or infection. Five is nail separation. This may happen as a result of injury, infection or a medication. And six is yellowing of the nails, which may be the result of chronic bronchitis.
For the Mayo Clinic News Network, I’m Vivien Williams.
The cause of psoriasis isn’t fully understood, but it’s thought to be related to an immune system problem with T cells and other white blood cells, called neutrophils, in your body.
T cells normally travel through the body to defend against foreign substances, such as viruses or bacteria.
But if you have psoriasis, the T cells attack healthy skin cells by mistake, as if to heal a wound or to fight an infection.
Overactive T cells also trigger increased production of healthy skin cells, more T cells and other white blood cells, especially neutrophils. These travel into the skin causing redness and sometimes pus in pustular lesions. Dilated blood vessels in psoriasis-affected areas create warmth and redness in the skin lesions.
The process becomes an ongoing cycle in which new skin cells move to the outermost layer of skin too quickly in days rather than weeks. Skin cells build up in thick, scaly patches on the skin’s surface, continuing until treatment stops the cycle.
Just what causes T cells to malfunction in people with psoriasis isn’t entirely clear. Researchers believe both genetics and environmental factors play a role.
Psoriasis typically starts or worsens because of a trigger that you may be able to identify and avoid. Factors that may trigger psoriasis include:
Anyone can develop psoriasis, but these factors can increase your risk of developing the disease:
If you have psoriasis, you’re at greater risk of developing certain diseases. These include:
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