Red bumps around the mouth may be related to acne, folliculitis, eczema and other causes, and need to be further differential diagnosis by a doctor. 1. Acne: Higher androgen levels, exuberant secretion of sebaceous glands, hyperkeratosis of hair follicle epithelium, and proliferation of Propionibacterium acnes can cause acne around the mouth, which can be manifested in the form of red pimples, erythema, and other lesions. 2. Folliculitis: If a single folliculitis around the mouth is infected by bacteria, it can cause a local inflammatory reaction and red bumps. 3. Eczema: due to the stimulation of various factors inside and outside the body, can appear on the basis of skin erythema papules, papules, can be manifested as red bumps around the mouth. It is recommended that people with red bumps around the mouth go to the hospital in a timely manner to clarify the cause of the disease and standardize the treatment under the guidance of the doctor, so as not to delay the condition of the body to bring adverse effects.