Many diseases of the anus and rectum can cause itching and anal whitening, especially perianal eczema, anal fistula and hemorrhoids. First of all, patients with perianal eczema often have this symptom, mainly due to more secretions in the anal canal, or eczema of the skin around the anus and resulting in increased secretions, thus stimulating the itching of the skin around the anus. If the patient scratches for a long time, it will lead to skin tissue hyperplasia, resulting in a whitish phenomenon. Secondly, itching and whitening caused by anal fistula. Long-term leakage of rectal mucus and pus leads to a long-term moist environment around the anus, resulting in whitening of the skin tissue due to moisture and accompanied by itching symptoms. Finally, long-term dietary and lifestyle irregularities, including long-term alcohol consumption and sedentary habits, can also lead to itching and whitening of the anal area due to long-term humidity.