Given the situation any physician would first suspect Child abuse as the cause. It is the ethical responsibility of the physician to suspect and protect the children. The injury
to the scalp
can cause the blood to accumulate around the lax tissues of eye lids and thus cause the black eye. You need to get your daughter checked for any coagulation disorders (clotting disorders) as they may cause bleeding spontaneously or after mild trauma. You can get a coagulation profile done. We also recommend that you watch your child for a couple of days when she sleeps as there is a chance that she be banging her head and compulsively pulling out her hair. In that case, she may have to be evaluated by a neurologist
, as it may signify any underlying brain disorder.