When the weather is hot, many people will feel some itching around the anus, some friends will think that the weather is too hot, too much sweating and get eczema, so they go to the drugstore to buy some antibacterial medication to wipe a little, but the effect may not be satisfactory. Today we discuss, triggered by perianal itching, in the end, what are the reasons? Systemic causes 1, allergic reactions: if you eat stimulating food, such as chili, mustard, spices, wine or specific protein food, also take certain drugs, such as antibiotics can be caused by allergies and anal itching. 2, parasitic diseases: such as ecchymosis, roundworm, vaginal trichomonas, lice, scabies, etc., can cause anal itching. 3, endocrine and metabolic diseases: such as diabetes mellitus, skin sugar content increases, stimulation of nerve endings caused by itching; hyperthyroidism skin itching, may be sweating, increased basal metabolic rate, emotional tension and so on. 4, blood diseases: iron deficiency anemia. 5, gastrointestinal diseases: acute and chronic diarrhea, constipation, gastrointestinal neurosis. Local factors 1, skin lesions: anal skin diseases such as anal eczema, neurodermatitis, ringworm, various warts, venereal diseases, sweat, etc., feces attached to the anal folds, stimulate the skin and cause itching. 2, microorganisms around the anus: such as pinworm parasites is often a common cause of anal itching in children, this anal itching, after deworming treatment, lining pants, such as changing and washing hygiene measures, can be cured. 3, anorectal diseases: such as anal fissure, anal fistula, hemorrhoids, anal sinusitis, anal papillitis, rectal prolapse, anal incontinence, etc., so that the anal opening secretion increases, vaginitis secretion stimulation, such as moist stimulation of the skin caused by itching. Chinese medicine understanding Chinese medicine believes that the external cause of anal itching is mainly feel the wind, dampness, heat and insect venom harassment, etc., so there is “all the itch is false, is the wind, heat is painful, heat micro itch” said, the internal cause of blood deficiency is often dry, liver and kidney insufficiency, visceral weakness, dampness and heat under the injection, etc., it is the former said: “blood is weak, wind, wind gathering is itchy! Wind, wind gathering is itchy.” The treatment is based on the principle of dispelling wind and dampness, clearing heat and removing toxins, nourishing blood and moistening dryness, and activating blood circulation and removing blood stasis, in order to achieve the efficacy of driving away the evil and supporting the right to stop itching. Chinese medicine external washing treatment itching Bitter ginseng 60 grams, 15 grams of snakebeds, 15 grams of groundnut, 15 grams of white moss, 15 grams of Sichuan pepper, 15 grams of cypress, 15 grams of cypress, 15 grams of rhubarb, 10 grams of alum 15 grams of water decoction fumigation, sitz baths, the second time a day, about a week to relieve the symptoms. There are obvious skin thickening with peach kernel 10 grams, safflower 6 grams, red peony 12 grams, etc. The effect is better. If the long-term treatment is ineffective, or repeated episodes, the use of drug injection or surgery, the effect is very good. Perianal pruritus has a long treatment cycle and must be cured until the local skin damage is completely normalized, otherwise the chance of recurrence is high.