<s>[INST] I had my hair colored Saturday afternoon. Sunday I woke up and had scabs and bumps on my neck and head. It has gradually gotten worse. I have been taken Benadryl tablets but the allergic reaction continues. My left eye is practically swollen shut, the left side of my neck is swollen and Im concerned. Do you think I should go to a physician or do you think it will run its course and be alright? My head itches and aches. [/INST] Cellophane You for contacting Chat Doctor. This could be allergic reaction to dye. Allergic response takes 2-3 days to improve. Does it always happen after applying it? I would suggest you following things:> Take levocetirizine one at night for 5 days.> Take montelukast one daily for one month. Research has shown that it decreases the allergic symptoms considerably. Report to hospital if:> Condition remain same after 2-3 days> Any unusual symptom appears> Condition deteriorates.> There is difficulty in breathing. Hope this answers your question. If you have additional questions or follow-up questions then please do not hesitate in writing to us. Wishing you good health. </s>