Hello. I am having seborrheic dermatitis on my face. From below eyes circle to neck it turns dark and I am having lot of white heads and black heads. White colour substance always discharging from that small pimples. I am having this problem for more than 15 years. Took lot of treatment but no use. Because of that my face looks abnormal. Forehead and eye has clear skin but below eyes to neck it's dark skin with lot of black heads. Can anyone please suggest how to cure this problem. I heard that there is no permanent solution for this disease.