Male Baldness Info

I’m an 18 yar old male and for the last couple months have been experiencing something weird. I’m not sure if this is natural hair loss or not.
I will have a painful irrititation in random spots on my scalp and when I have that pain if I run my hand through that location or pull the hair around that location a few strands of hair usually easily come out.
I’m not noticing large bald spots or anything, and baldness runs on my father’s side, but is it supposed to happen like this and come out after scalp pain? I also have a small bump that popped on up on the back of my head and I’m not sure if it’s related. Also some very sensitive scalp on the back of my head. I can’t even really lay down on the back of my head to sleep.

hi i have male pattern baldness (early stage). will bleaching my hair and then getting blue highlites damage my hair? i have dark brown/black hair. thank you.