well i no a few natural things that might help ive tried a few things, i dont have any problems but i still do it cause when you keep a healthy scalp then you will have nice thick healthy regrowth.
herbs that can help: rosemary and ginger this can be in an oil, or as a rinse.
marshmallow root: is meant to help with dry ichy scalp and dandruff, it also gives a really nice shine and amazing slip. i use this quiet a bit.
Stinging nettle: ive just started using this as a growth stimulator, but ive been researching that its meant to help with scalp problems. there are many shampoos round that have it in, im thinking bout getting a sulfate + cone free nettle poo.
oils: argan and tea tree, really effective mixed together and messaged in the scalp, i do this to my bf's hair for his dandruff.
i have used all of these things, i dont have any scalp issues, i didnt before i started using it, but all of these are great growth stimulator, many natural things have a few benefits.
i would really be trying same of these, im pretty sure that it'll help clear that all up