Hair in the ear canal may be a normal physiological phenomenon, but it may also be caused by diseases such as fungal disease of the external auditory canal. 1. Physiological phenomenon: under normal circumstances, there are hairs in the external auditory canal, the significance of its existence for the protection of the ear canal, to avoid flying insects and other foreign objects into the ear canal, with age, the hairs in the ear canal will gradually grow, which belongs to the normal physiological phenomenon, no need to be overly nervous. 2. Fungal disease of the external auditory canal: It is caused by the invasion of fungi (such as yeast, Candida, etc.) into the external auditory canal or changes in the internal environment of the external auditory canal, which is favorable to the propagation of fungi. In addition, the use of inappropriate ear drops, the use of water into the external auditory canal when swimming, and the abuse of antibiotics, etc., can all trigger the occurrence of this disease. Patients may feel uncomfortable or itchy in the external auditory canal, which may be accompanied by a small amount of watery secretion. Patients may feel a sense of obstruction in the external auditory canal due to the proliferation of fungi that block the canal. Observation of the ear canal may reveal long hairs (i.e., mycelium) in the canal. Treatment is generally to clean up the dirt in the external auditory canal, keep the external auditory canal dry, and locally apply broad-spectrum antifungal drugs, such as fluconazole ear drops and other treatments. It is recommended that the patient consult a doctor in time and follow the doctor’s instructions for treatment, so as not to delay the condition.