I think I am experiencing a chemical burn or allergic reaction after using hair dye. My scalp has sores that are weeping. I do have Seborrheic Dermatitis. What can I do at home?

Exam needed. Reactions to hair dye do occur and will resolve after a period of time. Since you have more than redness or itching, I recommend that you be examined by your physician or a dermatologist to see if secondary infection is present and if so, appropriate treatment can be started. In the meantime apply warm soaks and, if possible, apply a combination of antibacterial and cortisone type cream until seen.