What complication can occur if a foreign object remains lodged in the ear canal?

When a foreign object remains lodged in the ear canal, one significant complication that can arise is infection. The presence of an object can create an environment conducive to bacteria or fungi growth, as the object may trap moisture and debris, leading to an increased risk of otitis externa (outer ear infection). Additionally, the irritation from the foreign object can cause inflammation and damage to the skin lining of the ear canal, further compounding the risk of infection.

While hearing loss, earwax buildup, and inner ear damage may also be concerns, they are not as immediate or direct consequences of a foreign object in the ear canal. Hearing loss can result if the object obstructs sound transmission or causes damage, but it's more of a secondary effect. Earwax buildup typically isn't directly caused by foreign objects being lodged; rather, it occurs due to other factors. Inner ear damage is generally less likely unless the foreign object has penetrated deeper into the ear structure, which is a more severe and less common scenario. Thus, infection stands out as the primary concern when a foreign object is stuck in the ear canal.