Suggest Remedy To Get Rid Of Rashes On Face Due To Eating Fish

Hi, i;m a woman with 40 years age, I eat fish the three months ago and get rashes all over the body, I used habat sawda black seed soap and oil all over my body, my body does not have any rashes now, but on face still have rashes. Please help me what can I use to remove those rashed and which lotion can I use on face and body.