Perianal itching may be caused by perianal inflammation, pinworms, eczema, hemorrhoids and other disease causes. 1. Perianal inflammation: inflammatory diseases occurring in the perianal skin, which may be caused by intestinal secretion stimulation, infection and other reasons. Due to the stimulation of inflammation, patients may experience perianal itching, pimples, erosion and other symptoms. 2. Pinworms: Pinworms are mainly parasitic in the human intestinal tract, often crawl out of the anus and lay eggs around the anus, and their secretions can cause perianal itching. 3. Eczema: is caused by a variety of internal and external factors of the superficial dermis and epidermal inflammation, when the perianal eczema, the stimulation of inflammation, can also appear perianal itching. 4. Hemorrhoids: it is a venous mass caused by varicose and stagnant anorectal veins. Due to pressure, local feces and other stimuli, it will produce hemorrhoidal nuclei congestion, edema, prolapse, etc., which will cause inflammatory reactions or infections, leading to increased secretions at the anal opening and stimulation of the anal skin, which will cause itching. Perianal itching may also have other causes, such as perianal hygiene unclean, close clothing stimulation, etc. It is recommended that patients with perianal itching go to the hospital in a timely manner, follow the doctor’s instructions for treatment, to avoid delaying the condition.