Help--22, hair thinning, hairline.....

I'm a 22 year old male. Baldness is not prominent in my family on either
side.

However...I've noticed my hair thinning on the front part of my scalp and
my right side's hairline is noticeably higher than my left. My scalp lately
has been tingling and itching.

I have had my hair dyed several times in the past 9 months.

Also....earlier this year, I had round bald patches in the hair on my left
leg.

What exactly should I do?

I've read that ppl genetically predetermined to have hair loss can experience it just in their head or in the whole body so maybe that's what's starting to happen to you. Also dyeing you hair that many times is NOT good for your hair.. See your doctor and if it's really allopecia prevent it, because it's much harder to regrow hair than to keep it.. or so I've heard. Good luck.