NSAIDs reduce pain, inflammation and swelling while helping the body return to a normal temperature. When the body is injured or ill, it releases an enzyme known as COX. NSAIDs help control two specific types of COX enzymes, COX-1 and COX-2.
If you have an outer ear infection or a middle ear infection, your ears may be filled with a fungal or bacterial infection. This will likely temporarily affect your hearing and may make your hearing sound muffled in the affected ear.
It sounds like something in your ear canal is rubbing against your ear drum. When my patients have this symptom it is usually caused by a hair. Hair normally grows in the ear canal. If one gets a little long and points inward it is easy for an earbud to push it so it touches the ear drum. This touch will sound like loud scratching.