I have had the same problem since I was a child. I have tried every shampoo and every medication, creams, liquids. Ive tried washing my scalp with vinegar, listerine and olive oil. The ONLY thing that has worked for me is Tea Tree shampoo. The brand is Thursday Plantations. I use it everyday as my scalp and face itch so bad if I dont. At one point I had an over abundance of oil production on the crown of my scalp. The only thing that helped that was Tea Tree shampoo. I order it online but healthfood stores carry it. I get the seborrhea around my hairline as well and use a tea tree lotion. The less ingredients the better. I too have thick curly long hair but I never blow dry, I do use a flat iron about once a week but keep it away from the roots. I use plain Dove conditioner but I dont use it on my scalp, only the middle and ends of my hair. I use plain Dove bar soap and make it into a body wash and use it for my face as well. Also I exfoliate with pure organic cane sugar once a week or more. Ive found the less ingredients and the more natural, the better. I hope this helps as I know how uncomfortable this can be. Mine would itch so bad, I would dig it in my sleep and wake up with bloddy gunk underneath my fingernails. It would build up so bad, I had to use a comb to scrape the clumps off but I know it's not goodd as you can get an infection, I ended up getting mrsa on my scalp. Only do this if it is built up so bad. Once you use the shampoo and get it under control you wont have hardly any clumps. I also get it in my eyebrows, dont be afraid to use the shampoo for them as well. And let it sit for a while. Good luck to you!!!