To answer your question, it is very likely that the infection from a tooth travels to the ear. This is a very common cause of ear infections. In many people who have dental abscess or even just a simple tooth infection, if it remeains untreated for long can lead to the development of infections in the middle ear. But for this to happen the infection has to spread to the esutachian tube which is the communication of the ear in the throat. Since youre on antibiotics, its unlikely that the infection has spread so far unless the organism is resistant to the antibiotics, in that case it can cause the pain that youre feeling alongwith the fever.
Another reason that youre feeling this kind of pain is that pain from the tooth can be felt in the region around the ear, as referred pain. This is because the two regions are supplied by branches of the same nerve, which is the trigeminal nerve...the reffered pain should be felt around the ear.
Now if you have a sore area behind the ear over the bony surface, you could have mastoditis which is infection of the mastoid process of the skull. This infection can occur secondarily to severe ear infections but not tooth infections. The symptoms of such an infection can be,
- Pain behind the temporal region
- Ear swelling
- Ear infection
- Redness of the bone behind the ear
- Drainage from an ear
- Ear pain
This type of infection needs early diagnosis and treatment to prevent complications.
So the answer to your question is while it is possible for the infection to travel from the tooth, it is not likely in your case as the fever is mild as you say and you have not mentioned any ear discharge, or dizziness or hearing loss or even ear pain. But without an examination it is difficult to diagnose the cause of the pain that youre feeling, it should be properly evaluated by an ENt specialist to see if you have mastoditis or an ear infection. I hope this answers your question, if it doesnt please let me know
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