Whether or not you are able to wash your hair more than 40 days after craniotomy depends on the situation at that time. Generally speaking, if the scalp is healing normally, there is no blood or fluid seepage, no redness, swelling, heat and pain, and there is no skin defect, there is no problem to wash the hair at this time. However, in the clinic, if after more than 40 days of craniotomy, there are still residual wires on the head that have not been removed or there are certain reactions to the wires, such as redness, swelling, heat and pain, and there is a certain fluctuation in the subcutaneous sensation, there is oozing of blood, oozing of fluids, and even caused a certain degree of defects. This situation this is no way to wash hair, often this time need further special treatment. Another point is that if the patient washes his hair after 40 days, he must pay attention to the change of position, as far as possible, the patient is placed in the supine position on the bed. Someone to help them wash their hair, do not bend over to wash their hair, this is very easy to cause a transient fainting, causing secondary injury.