Irritation of the skin at the exit of the rectum, accompanied by the desire to scratch. The intensity of anal itching is increased by moisture, pressure, and abrasion caused by clothing and sitting. It may be caused by irritating chemicals in food (as in spices, hot sauces, and peppers); irritation due to frequent liquid stools, as in diarrhea; diseases, such as diabetes mellitus or HIV infection, that increase the possibility of yeast infections; and psoriasis. Other causes of anal itching include hemorrhoids, anal fissures, abnormal local growth of anal skin (anal papillae), and skin tags. Treatment is directed first toward relieving the burning and soreness, including cleaning and drying the anus thoroughly, avoiding leaving soap in the anal area, showering gently without directly rubbing or irritating the skin, and using moist pads rather than toilet paper to clean the anus after bowel movements. Local application of cortisone cream may help. Also known as pruritus ani.
- Anal papilla
Anal papilla: A skin tag that projects up from the junction between the skin and the inside lining of the anus. Anal papillae tend to occur with anal fissures and may be detected on a digital examination of the anus or with a scope. Removal is only necessary if the anal papillae are causing symptoms.
Analbuminemia: 1. Properly, an absence of albumin from the blood. 2. More loosely, a low level of albumin in the blood. Synonymous in this usage with hypoalbuminemia.
- Analgesic drug
Analgesic drug: A drug designed to control pain. Analgesic comes from the Greek an-, without + algesis, sense of pain = without a sense of pain.
Analog: In biochemistry, a substance that is similar, but not identical, to another.
Analogous: In anatomy, similar in appearance or function but otherwise different. Two structures may be analogous if they serve the same purpose but differ evolutionary in origin as, for example, human and insect legs. As compared to homologous.