There are two main conditions to consider when a patient has a lump inside the cochlea. The first is a pseudocyst of the cochlea. In the initial stage, the cyst is not very large and may not have any special sensation, but only a slight stuffiness and swelling. Sometimes this is caused by the patient squeezing one side of the ear while sleeping, or by a recent trauma to the ear, which often requires surgery to remove it completely. In the second case, the patient may have a lump in the cochlea due to inflammation, which may be caused by frequent touching of the cochlea with the hand, resulting in an infection of the mucous membrane of the skin, which may be painful. In terms of treatment, you can apply Bactrim ointment, or Denide cream, for anti-inflammatory and swelling active treatment, and the condition should improve.