I had a very sever allergic reation to hair dye about a month ago that resulted pus coming off my head, red and etchy scalp and rash all over my body, ended up going to ER and was prescibed prednison and betaderm. Got a little better but still suffering from etchy body and sore scalp with reappering redness, wondering what to do.

Talk to your doctor and get referred to a dermatologist. You might need more meeds to get back to normal. This has probably made your skin hypersensitive as well.