The causes of constant acne around the mouth and chin include acne, folliculitis, eczema, herpes simplex, etc. Treatment is based on medication. 1. Acne: If the acne is caused by acne, you can give topical adapalene gel, benzoyl peroxide, fusidic acid and other drugs, or combined oral isotretinoin capsules, doxycycline and other drugs. 2. Folliculitis: If the acne is caused by bacterial infection, you can give topical mupirocin ointment, clindamycin gel, etc.; when the condition is serious, you can take oral cephalosporin or penicillin antibiotics. 3. Eczema: If the acne is caused by skin inflammation triggered by various factors, then topical calcium-modulated phosphatase inhibitors such as pimecrolimus, tacrolimus and other drugs can be given. If itching is obvious, oral antihistamines such as loratadine can be combined. 4. Herpes simplex: If the acne is caused by herpes simplex virus infection, interferon and vasiclovir can be given to anti-viral treatment. Lastly, if you have pimples around your mouth and chin, please consult your doctor and use the medication as prescribed by your doctor.