Does it itch..? Its hard to say without seeing a picture of a rash,which would help diagnose better. As eyes are sensitive parts so applying any medications without knowing exact problem may be harmless sometimes. Most probably it could be any contact allergy or dermatitis to creams or makeups ( like eyeliner and mascara ) that you apply. So first avoid using those makeups and creams and see if it works then using those one at a time to see if any products will cause you rash again. There are also other conditions associated with rash around the eyes so consulting dermatologist will be the better idea. Let us know further..