Oral steroids cause new hair growth as well as making existing hair darker and more coarse, therefore more visible. These changes will go away after you go off the dexamethasone. If you absolutely can't wait, you can bleach the hair to make it less visible. Shaving the hair will actually make it look more visible as it grows out, so don't do that.
Thyroid forum moderator
Ulcerative colitis; 9th year of remission with Remicade. Inflammatory osteoarthritis; osteonecrosis from steroids. Grave's disease post-RAI and now on Levothyroxine. Type II diabetes induced by steroids. #ucsucks