Small blisters on dolls may be associated with diseases such as papular urticaria, chicken pox, and hand, foot and mouth disease. 1. papular urticaria: it is an allergic reaction to mosquito bites, with intense itching of the skin, leading to the appearance of spindle-like blisters. 2. Chickenpox: when the baby’s immunity is low, it can be transmitted through droplets, blisters and other means, which can be infected with chickenpox – herpes zoster virus, resulting in blisters on the head, face, trunk, limbs and other places. 3. Hand, foot and mouth disease: can be infected with enterovirus through the respiratory system, digestive system, etc., resulting in symptoms of herpes or maculopapular rash on the palms of the hands, feet, buttocks and other places. Dolls on the body of small blisters, it is recommended that parents take their children to the hospital in a timely manner, to clarify the cause of the disease, targeted treatment. At the same time, should pay attention to local hygiene, avoid scratching the blisters with their hands, so as not to cause infection.