What are the causes of pimples at the corners of the mouth?

In general, there are various causes for pimples appearing at the corners of the mouth, mainly including unhealthy lifestyle habits, hormonal imbalances, allergic reactions, folliculitis, and herpes simplex.

If personal hygiene is neglected, such as failure to wash the face and clean the skin at the corner of the mouth in a timely manner, or frequently touching the corners of the mouth with hands, it can easily lead to clogged pores due to oil and dirt, resulting in pimples. Consuming excessive amounts of spicy, stimulating, or greasy foods can stimulate the sebaceous glands around the mouth to secrete more oil. High-sugar foods may also lead to excessive oil production by the skin, increasing the risk of pimples at the corners of the mouth. During stages such as puberty, menstrual cycles, and pregnancy, fluctuations in hormone levels in the body may cause increased sebum production, clogged pores, and the formation of pimples.

Using certain cosmetics, toothpaste, or oral care products may cause allergic contact dermatitis due to their ingredients, manifesting as redness, swelling, and pimples at the corners of the mouth. Folliculitis, an inflammation of the hair follicles caused by bacterial infection, is also prone to occur at the corners of the mouth. When hair follicles become blocked, bacteria can easily multiply and cause infection, resulting in pimples. Alternatively, it could be herpes simplex caused by a herpes simplex virus infection, which forms clusters of small blisters at the corners of the mouth. These blisters may rupture and form ulcers, accompanied by a burning sensation.

In terms of treatment, the first step is to identify and eliminate the triggering factors, maintain good personal hygiene habits, and avoid using products that may cause allergies. For folliculitis and herpes simplex caused by microbial infections, doctors may prescribe antibiotics or antifungal medications. At the same time, supplementing with appropriate vitamins, adjusting the diet, and ensuring adequate rest can help alleviate symptoms. If necessary, consultation with a dermatologist or nutritionist may help formulate a personalized treatment plan.