Anal eczema is an atopic dermatitis that occurs in the skin around the anus, and erythromycin ointment, an antibiotic ointment for the skin, is not very effective in treatment. However, skin infections due to scratching after eczema can be used appropriately. Eczema is a condition that causes itchy, red, dry and cracked skin as its main symptoms. A common allergic skin disease, this disease is treated mainly with steroid hormones, and when the effect is not good, some antihistamines can be used to reduce the skin allergic changes, thus improving the symptoms of itching, rash and exudation. In general, without excessive scratching, it will not cause skin infection. In contrast, erythromycin ointment, which belongs to the macrolide class of antibiotic ointment, is mainly pharmacologically useful for the treatment of bacterial infections of the skin inflammation. So, in terms of pharmacological action, using erythromycin to treat eczema is not a good choice. Simply put, it is a treatment that is not symptomatic. After the appearance of anal eczema, in addition to choosing the right medication to treat and improve the symptoms, you still need to avoid spicy and stimulating foods, avoid smoking and alcohol, and reduce overly stressful emotions in general. At the same time, try not to contact substances that can easily cause allergies, keep the skin around the anus dry, and pay attention to personal hygiene.