A member asked:

Can an infected tooth cause a swollen mastoid lymph node? i have a smooth hard lump right behind my ear on the same side no pain and doesn't move.

8 doctors weighed in across 3 answers
Dr. Michael Stern answered

Specializes in Facial Pain/Migraine, Dentofacial Cosmetics and Dermal Fillers, General Dentistry, Snoring/Sleep Apnea, Oral DNA Testing/nonsurgical gum disease treatment

Mostly we see swollen nodes in the neck or under the jaw with dental infections. You do not say if you do have any dental symptoms. I personally have never seen mastoid area nodes swollen due to a dental infection. This could be a abnormal lump that should be checked out and has no relationship to a bad tooth.

Answered Jan 3, 2015



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Dr. Lance Panarello answered

Specializes in Dentistry

I have seen a few patients with a mastoid swelling that resolved when they had an infected upper wisdom tooth removed. You should still be seen by a physician in case something else is going on.

Answered Dec 9, 2016


Dr. Michael Miller answered

Specializes in Wound care

Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells and digested food. Lymph nodes "taste" the lymph for anything bad like bacteria/viruses/cancers, etc. When it detects a problem, it alerts the immune system and your body reacts. They enlarge in response to the inflammation they create when they react. They shrink when all is well.

Answered Jan 15, 2016



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