
Less common types of psoriasis Pustular psoriasis Inverse psoriasis is made worse by friction and sweating, so it can be particularly uncomfortable in hot weather.
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It can cause large, smooth patches of skin in some or all these areas. This affects folds or creases in your skin, such as the armpits, groin, between the buttocks and under the breasts.

This type of psoriasis sometimes occurs after a streptococcal throat infection and is more common among children and teenagers. There's a good chance guttate psoriasis will disappear completely after a few weeks, but some people go on to develop plaque psoriasis. Guttate psoriasis causes small (less than 1cm) drop-shaped sores on your chest, arms, legs and scalp. Nails can often become loose and separate from the nail bed. Psoriasis can cause your nails to develop tiny dents or pits, become discoloured or grow abnormally. In about half of all people with psoriasis, the condition affects the nails. In extreme cases, it can cause hair loss, although this is usually only temporary. Some people find scalp psoriasis extremely itchy, while others have no discomfort. It causes patches of skin covered in thick scales. It can occur on parts of your scalp or on the whole scalp. Scalp psoriasis is a type of plaque psoriasis. In severe cases, the skin around your joints may crack and bleed. The plaques can be itchy or sore, or both. They normally appear on your elbows, knees, scalp and lower back, but can appear anywhere on your body. Its symptoms are dry skin lesions, known as plaques, covered in scales. Plaque psoriasis is the most common form of psoriasis.
