Allergy to cool oil can lead to contact dermatitis, often manifested as erythema, papules, papules, accompanied by localized redness, swelling, itching, burning sensation and so on. Cool oil is mainly used for colds and headaches, heat stroke, motion sickness, mosquito bites and so on. It can be applied to the temples or affected areas when needed. Those who are allergic to the ingredients of Qingliang Oil or a small number of allergy-prone patients may experience erythema, papules, papules with redness, swelling and intense itching at the contact site. After the application of cooling oil, if local erythema, papules, papules, accompanied by obvious burning sensation or itching, local redness and swelling, etc., should immediately stop using, and wash with water, if necessary, consult a physician. The contraindications of Qingliang Oil are not clear, but it is forbidden to use on eyes, vulva and other skin mucous membranes and broken places. It is recommended that patients who are allergic to cooling oil go to a regular hospital in time for a clear diagnosis, and follow the doctor’s instructions to actively carry out the treatment to avoid delaying the condition.