Infant neck crease is easy to grow between the rubella, also easy to grow prickly heat, eczema, so should be from clothing, diet, environment and other aspects of care. 1. rubella: if the baby is wearing too tight for a long time, the neckline is too small clothing, resulting in the neck folds of clothing and skin friction, local sweat impregnation, moisture, which can lead to the baby’s neck crease between the rubella, nursing care should pay attention to the baby to wear loose clothing, and to avoid the baby’s neck sweating, moisture, give the baby to change the clothes. 2. prickly heat: prickly heat is a kind of small pimples and blisters occurring in summer or hot and humid environment when the sweat pores are blocked, accompanied by itching and stinging sensation, the baby’s neck crevice can grow prickly heat, nursing care should pay attention to keep the indoor cool and ventilated, to avoid the baby in a long period of time in the high temperature, hot and humid environment. 3. Eczema: Eczema is an inflammatory disease of the epidermis due to abnormal immune function, skin barrier dysfunction and other factors, the baby neck crevice can grow eczema, care should be actively looking for allergens in the environment, to the baby to wear cotton clothing, to avoid man-made fibers lead to allergies in the baby, the baby should pay attention to a light diet. In addition to the above diseases, other diseases can also lead to the baby’s neck crevice abnormal rash manifestations, it is recommended to consult a doctor to identify the cause, and seek care advice from the doctor.