DOES A BUMP ON SCALP CAUSE HAIRLOSS OR WHAT COULD IT BE A CAUSE OF.

Direct hits can sometimes cause hair loss, but there are many other causes for hair loss. The stress of an illness, overactive or underactive thyroid, hormone imbalances, medicines used for gouts or using blood thinners  are all causes of hair loss.  It can also be part of an underlying disease like diabetes or lupus.

Since  hair loss can be an early sign of a disease, if you are concerned you sholud go see a doctor