The following reasons can be considered for the appearance of white blisters on the neck of infants: 1. Allergies, skin allergies to something, can check the clothing or the surrounding environment to determine. 2. Local skin inflammation, may be the milk flow to the neck when vomiting, not cleaned up in time, causing the symptoms of local folliculitis, there will be local white blisters and pain. 3. This is the case because of eczema. 4, local infection, mainly due to bacteria, viruses, mycoplasma and other infectious phenomena, such as herpes simplex caused by herpes virus infection. 5, drug rash, recently ate a certain drug adverse reactions, causing white blisters in the neck, to be found in time, and can not eat similar drugs in the future. If the situation is more serious, it is recommended to go to the hospital in time for consultation and treatment.