Headache dizziness should not be associated with the hair greying and the psoriasis - unless you are taking some medications which could cause this as side effect. PSORIASIS is chornic disease which can have courses of remissions and relaspes.. there is no guaranteed cure for this. Psoriasis can only be controlled and the choice of treatment would depend on the extent of involvement. GREYING OF HAIR --- The most common cause is genetic predisposition due to which different people start greying of hair at different ages and it progresses at an individually variable rate. Pre mature graying is sometimes associated with nutritional deficiencies....... HAIR LOSS is a progressive problem and if not tackled in time tends to keep worsening over time. There are various causes of hair fall. Read my health feed for a better detailed understanding. https://fit.practo.com/#!/content/28405 After reading this I hope you will be convinced that a proper thorough examination of your scalp from a qualified dermatologist will be advisable for a fruitful outcome. you can consult with me and i can advice which medications are to be taken. Hope this was helpful.