The baby’s head after the fall left a hard bag, may be caused by the formation of subcutaneous hematoma. The baby itself is more fragile, in the head after a fall, may cause subcutaneous blood vessel rupture and the formation of hematoma, but the general volume is small, hematoma around the tissue bulge, local swelling, local pain, the child constantly crying, at this time can be a cold compress to promote the vasoconstriction of the scalp, beneficial to the subsidence of swelling. When the fall injury caused infants and young children to appear huge capitellar sub-tendinous hematoma, can cause anemia and even hemorrhagic shock, need immediate medical attention. After the baby’s head fall, we should consult a doctor in time, check whether there is skull injury and other conditions, according to the clinical manifestations or imaging, to clarify the scope of the injury, and actively eliminate the hematoma.