Small red blisters on the body may be related to eczema, herpes and so on. 1. Eczema: moist or sweaty skin, hot and cold stimulation, excessive washing of the skin, contact with certain allergens, may cause eczema of the skin, which will lead to the appearance of small red blisters on the skin, and will also be accompanied by the symptoms of itching. 2. Herpes: often due to the body’s immune system, human herpes virus infection, including chickenpox, herpes zoster and so on. Often manifested as skin, mucous membrane changes, there will be a single or multiple blisters, and there is a certain degree of contagious. Small red blisters on the body can also be seen in other causes, it is recommended to consult a doctor in a timely manner, a clear diagnosis, under the guidance of the doctor for targeted treatment or therapy.