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Pruritus ani is the irritation of the skin at the exit of the rectum, known as the anus, causing the desire to scratch. [1] The intensity of anal itching increases from moisture, [2] pressure, and rubbing caused by clothing and sitting. At worst, anal itching causes intolerable discomfort that often is accompanied by burning and soreness.
Other types of anal itching can be caused by certain disorders or diseases of the anus such as pinworms, psoriasis, anal fistula, anal cancer, contact and atopic dermatitis, hidradenitis ...
Perianal cellulitis manifests as multiple symptoms that are inconsistent with a systemic disease. The most notable feature is a very distinct redness around the anus, and other signs of inflammation which can include swelling and itching at the site. [4] Other associated symptoms with perianal cellulitis include pain when defecating and bleeding.
The most common symptom is pruritus ani, or itching in the anal area. [1] The period of time from swallowing eggs to the appearance of new eggs around the anus is 4 to 8 weeks. [2] Some people who are infected do not have symptoms. [1] The disease is spread between people by pinworm eggs. [1]
The anus is the site of potential infections and other conditions, including cancer (see anal cancer). [4] With anal sex, the anus can play a role in sexuality. Attitudes toward anal sex vary, and it is illegal in some countries. [5] The anus is often considered a taboo part of the body, [5] and is known by many, usually vulgar, slang terms.
Scientists are still unraveling the mystery of why skin conditions like eczema cause people to itch. One known cause is inflammation, which gets worse as people scratch and their skin becomes damaged.
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