I had my first perm when I was 9. I had sores every relaxer til I was about 16. Relaxers at the salon were always the WORST. Edges fell out twice. Psoriasis on the scalp. Eczema from my face down to my knees. Turrble...
Get some wasabi and make a thin paste for a scalp stimulant. This is gonna feel like a relaxer on steroids, but the circulation will help TREMENDOUSLY
Go to the doctor and have you Ferritin Serum checked. 13-200 is considered normal. You want yours at about 100. I checked mine last year and it was 13. This year, it's 31 and my hair is growing like mad. My hair used to take 3 mos to grow one stankin' inch. Now, I'm getting at least 3/4 inch per mo.
Dandruff is never good. I don't care what anyone says. Dandruff inhibits sebum from making it as far down the ends as possible and it inhibits circulation. For example, I have a ball python. Snakes shed monthly even over the eyes. If the shed doesn't come off, they go blind. Wash your hair at the first sign of dandruff.
Fungus, bacteria, allergies and auto-immune problems all cause dandruff and none of them are good reasons.
Also, if you have a tight scalp, that is also a reason for thin hair. Hair needs fat. Notice that most bald men have a shiny scalp because the skins is so taught.
Add pumpkin seed oil to your diet. Vegetable fats are very good at nourishing the skin from the inside.
Do niacin flushes. NOT NIACINAMIDE!! 500 mg of niacin will open your capillaries and allow healing blood to rush through and deliver oxygen to places it couldn't previously get. I suggest you treat this one like a bad laxative and stay home. Trust me.
Exercise, water, vitamins, diet... yada yada... heard that before.... yeah, yeah, yeah...
Unfortunately, what's good for your scalp isn't necessarily good for your hair. I stopped wearing protective styles and wore my hair out EVERY DAY. I did not put any stress on my scalp. I washed every other day and stopped using grease, mineral oil, or any oil on my scalp and massaged until my natural sebum showed on my fingers. (Do some jumping jacks or sump'n)
It took YEARS to get my scalp healthy.
My suggestion is to start with getting your ferritin up and doing the niacin flushing. Niacin also gets your cholesterol under control. My triglycerides are at 35 and I'm 190 lbs. Oh! and check your TSH levels for your thyroid, too. The ideal is 1.0.
Best of luck, as well!!! And...