Guttate psoriasis is a type of psoriasis that affects approximately 10% of people with psoriasis. It is characterized by small, red, scaly lesions that appear on the skin. These lesions are usually less than 1 centimeter in size and can occur anywhere on the body, but are most commonly found on the trunk, arms, and legs. The exact cause of guttate psoriasis is unknown, but it is believed to be an autoimmune disorder. The immune system mistakenly attacks healthy skin cells, causing inflammation and the formation of scaly, red patches on the skin. It is also believed that guttate psoriasis may be triggered by an infection, such as strep throat or a respiratory infection. Guttate psoriasis typically presents as small, red, scaly lesions on the skin. These lesions are usually less than 1 centimeter in size and can be found anywhere on the body, but are most commonly found on the trunk, arms, and legs. The lesions are usually not as thick or as large as those found in other types of psoriasis, such as plaque psoriasis. In addition to the lesions, people with guttate psoriasis may also experience itching, burning, and general discomfort. Some people may also experience joint pain and swelling, a symptom known as psoriatic arthritis. A dermatologist can typically diagnose guttate psoriasis by examining the skin and taking a medical history. They may also perform a skin biopsy to confirm the diagnosis.Treatment for guttate psoriasis typically involves topical medications, such as corticosteroids, vitamin D analogues, and coal tar. In more severe cases, phototherapy, systemic medications, or biologic therapies may be used. In addition to medication, lifestyle changes can also be helpful in managing guttate psoriasis. These include avoiding triggers, such as stress and infections, and taking steps to maintain healthy skin, such as using moisturizers and avoiding harsh soaps.