The causes of anal pruritus can be summarized as follows: 1, rectal, anal diseases make the anal part excessively moist, increased secretions, stimulation of the anus leading to itching. 2, skin diseases, mycotic infections, neuritis, dermatitis, seborrheic dermatitis caused by excessive sebum secretion, eczema, etc., can cause anal pruritus. 3, poor hygiene, local unhygienic, infrequent cleaning, fecal stimulation of the skin induced pruritus. 4, too much vaginal secretions in women, flow to the anal part to stimulate the skin. 5, bacterial infection: such as E. coli, staphylococcal infection, etc.