Hi, You seem to have alopecia areata. There may be complete bald patches on scalp. The lesion might occur suddenly. Exact cause is not known. It is considered to be autoimmune disorder. You consult dermatologist for firm diagnosis. Blood tests may be done to rule out internal disease like thyroid dysfunction. I would like to suggest few hints to improve the condition... - immunomodulator like levamisole 50 mg at night - biotin tab 10 mg once a day - trioxalen lotion to apply at night on bald patches - mild steroid lotion to apply in morning on bald patches - if no response in few weeks, intradermal steroid inj. in bald patches by expert dermatologist may be considered - oral steroid should be avoided I hope you may be improved in few weeks after taking treatment from expert dermatologist. This would be helpful to you in managing your problem. Thanks. Dr. Ilyas Patel MD