It is very rare to have an allergic reaction to painkillers, and you can take anti-allergic drugs such as paracetamol. If the allergy is more serious, you must go to the hospital in time, after active treatment, the vast majority of patients can recover. It should be noted that during the period of allergy, patients should avoid scratching the allergic area with their hands, and also avoid hot water touching the allergic skin. Diet should be light, eat more fresh vegetables and fruits rich in vitamins, avoid spicy, stimulating and greasy food, and quit smoking and drinking. It is also important to pay attention and try to avoid easily allergenic foods, such as seafood, eggs, mangoes and so on.