A bald spot is a sign of hair loss or alopecia. if untreated or ignored chances of regrowth are drastically decreased. here are 5 things you should do if you notice a bald spot. a variety of factors can contribute to alopecia from diet, hormonal changes, age, stress, and the list goes on. bald spot on back of head Nov 19, 2016 · that’s because, according to scientists, 85% of guys will lose some measure of their hair at one point or another in their lives. and for a lot of guys, that’ll mean one, dreaded thing: a big ol’. Instant Results 4 sep 2015 his bald spot was caused by bumping his head on a kitchen sink. hair will normally grow back, but if the trauma is really severe it's like . Your doctor will usually be able to diagnose alopecia areata based on examination of the areas of your hair loss and your symptoms. to look for further evidence, your doctor may pull gently on the hairs near the edge of the bald area to determine whether these hairs come out very easily and t...