Fiberglass to get a small rash on the body, considered to be caused by contact dermatitis, usually take medication, specific please follow the doctor’s instructions. Contact dermatitis refers to the skin contact with certain exogenous substances (glass fiber), causing an inflammatory reaction of the skin at the contact site or even outside the contact site. The patient will develop skin damage, and the extent of skin damage is usually roughly the same as the contact material, the boundary is clearer. When contact with glass fibers occurs, first rinse with plenty of water (not hot water) and then seek medical attention promptly. For the acute stage of contact dermatitis, when there is no oozing, topical glycerite lotion can be used; for the subacute stage of contact dermatitis, when there is no oozing, topical glucocorticoid cream can be used. If necessary, oral antihistamines (such as loratadine), vitamin C, calcium and other drugs. However, it is not excluded that it is caused by other factors, and it is recommended that the patient consult a doctor in time to clarify the cause and give targeted treatment, do not blindly self-medication.