Baby’s hair grows vertically, there may be several reasons: 1, may be because the baby’s hair is hard, so the hair grows vertically; 2, related to the baby’s nervous constitution, can be manifested as the usual crying, poor sleep, easy to wake up, irritable and irritable, also accompanied by constipation or diarrhea and other performance; 3, related to diseases, such as food accumulation, noma, the affected child’s hair is dry and yellow, is the performance of the spleen and stomach deficiency cold and liver fire. Malnutrition anemia, calcium deficiency, zinc deficiency and other reasons can cause the baby’s hair to grow vertically; 4, related to the contraction of the erector spinae muscle, the contraction of the erector spinae muscle within the scalp will cause the baby’s hair to grow vertically, and calcium deficiency is the main cause of the contraction of the baby’s erector spinae muscle.