It is possible to use alcohol to disinfect the ear canal. Generally, 75% alcohol is needed to achieve the disinfection effect, but long-term use is not recommended. Generally, 1-2 times a day, and the longest time should not exceed three days, because alcohol has a certain degreasing effect, and if applied for a long time, it will cause dryness and discomfort of the skin, and sometimes it will also cause imbalance of the flora in the ear canal, and even lead to serious infection. If it is caused by inflammation in the external ear canal, it is recommended to treat it with antibacterial agents first, along with topical antibiotic ear drops. If it is a local boil formation, disinfectant medication such as iodophor can be used, which can promote the maturation of the boil and help the recovery of the condition, and also does not produce a deglutition effect like alcohol, which can cause a dry feeling or discomfort. If the boil matures, it can be incised and drained as soon as possible for a quick recovery of symptoms.