pimples on scalp, itches today (3rd)day more so, have ha d rosasea before but never on scalp, what to put on? female, 53, educator. short straight hair ,natural gray. use no chemicals , no changes in shampoo in past 15 months. only new medication in past 10 days have been 5 continuos injeccions for back spams, dexaneurobion and homopeatic drops for thyroid. what to do, very uncomfortable.