Small blisters are generally referred to as small blisters. Small blisters on the chin may be caused by contact dermatitis, folliculitis, herpes simplex, acute eczema and other diseases. 1. Contact dermatitis: contact dermatitis is a disease caused by skin contact with exogenous substances that irritate the skin. Patients will have symptoms such as pimples, blisters and erythema, which can manifest as small blisters on the chin. 2. Folliculitis: Folliculitis may be caused by bacterial infection due to skin injury, hair plucking and other factors. Patients will have white pustules, itching and other symptoms, and some patients may have pimples and small blisters on the chin. 3. herpes simplex: herpes simplex is a viral skin disease caused by the herpes simplex virus, the patient’s lips and chin can appear on the erythema or normal skin clusters of small blisters, blisters clear and transparent, and later become turbid, rubbed with vesicles, oozing, crusting. 4. Acute eczema: the etiology of acute eczema is not yet clear, it may be triggered by factors such as bad living habits, long-term insomnia, excessive sweating and so on. Patients will appear at the skin pimples, small blisters, itching and other symptoms, which can be manifested as small blisters on the chin. There are many causes of small blisters on the chin, and patients need to go to the hospital to find out the cause of the disease.