There are many causes of redness inside the patient’s ears: i. Patients may develop fever after upper respiratory tract infection, and after the fever, the patient’s ear temperature will also increase, which will cause the mucous membrane of the patient’s ear canal to also become red and congested, and in severe cases, even painful; ii. Consider patients who get dirty water inside their ears when washing their hair, bathing, or swimming, which is especially likely to stimulate the mucous membrane of the ear canal to become red; iii. Patients often dig their ears repeatedly, which is also an irritating effect on the mucous membrane of the ear canal; iv. If patients have eczema inside their ears, the epidermis will also become rough and red, and there are often many secretions flowing out. Regardless of which of the above causes lead to redness inside the patient’s ear, it is necessary to actively deal with it to avoid aggravating the infection to bring unnecessary trouble to the patient, and if necessary, the patient can go to the hospital for detailed examination and treatment.