I was taken off methotrexate in November because my neuts had fallen to 0.8. Told to stay away from crowds. Had bone marrow biopsy which showed lack of folic acid. Neuts up a bit and back on methotrexate and folic 2 ,3 times aweek. Now got 3 disc shape rash on back and very itchy scalp. Thought I'd got nits!! But haven't. Help. Anyone else got awful constant itching? What can I do?