Life, many parents will encounter 3 ~ 4 months of age baby hair loss phenomenon is very worried, will not be malnutrition lack of vitamins, calcium deficiency, skin diseases? Grandparents will also say is “ghost shaving”, in fact, is not scientific, the following introduction to the common causes of baby hair loss: 1, physiological alopecia: fetal hair growth period is short, in the right time will gradually fall off is a normal phenomenon. 2, non-disease alopecia: occipital baldness long-term head and a part of the friction caused by, for example, head eczema, discomfort, otitis media, dry heat, etc., leading to frequent baby rubbing the head leading to hair loss. 3, pathological alopecia: (1) baldness baby head a piece of hair loss phenomenon, and hair loss area a bald: this time to alert the baby is suffering from baldness. To consult a doctor in time for symptomatic treatment (2) baldness: baldness after birth is mostly related to drugs, scalp injury, malnutrition, need to consult a doctor to confirm the diagnosis. 3 months old baby hair loss symptoms parents should not be nervous, the specific causes can be divided into physiological alopecia, pathological alopecia and non-disease alopecia friction caused by hair loss. Parents can use the above reasons to analyze, such as pathological alopecia, we recommend timely consultation with a medical professional for diagnosis and treatment.