Psoriasis is basically a long-term affliction. Treatment for psoriasis of the scalp (and to a lesser extent forehead) is Topicorte 0.25% skin cream or ointment for an "attack", not to be used more than once or twice a week as Topicorte is a steroid. I was also told to wash my hair with Aphosyl shampoo which contains coal tar and alcohol 5%. Early on I could buy the shampoo at Boots, but in the last few years I can't buy it in Thailand because it contains alcohol!!!! I get mine from the UK, but I am sure any reasonable country would sell it (I can't see many abusing alcohol by drinking shampoo, can you?). Topicorte you can get in most pharmacies but get the larger bottle of 15 g as it is a lot cheaper than the smaller 5 g bottle. Good luck, it really worked wonders for me, and still does!