A two-and-a-half-year-old baby with ear wax blocked inside the ears will of course have an effect. The blocked ear canal will easily affect the hearing, and there will often be a noticeable itching sensation, and the child will often use his hands to pick his ears, which will easily lead to the formation of otitis externa. If a child gets water in the ear while bathing or swimming, the earwax will swell up with water and the child will experience a significant swelling and pain, and a serious loss of hearing. It is recommended that parents take their child to a hospital ENT department for a detailed examination, and if it is determined to be earwax you can have the doctor clean it out directly. If the child does not cooperate parents must explain in detail and comfort well to avoid forcing the earwax out to avoid scratching the external ear canal or even perforating the eardrum.