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A member asked:

I had a tetanus shot 2 days ago. it is a hard lump where i got the shot and my arm really hurts there. is this normal?

2 doctors weighed in across 2 answers

No: But it will settle down if you leave it alone.

Answered 10/4/2016

5.4k views

Thank

Yes: The material is injected into muscle tissue and may produce a local reaction like a knotted up area in the muscle. The tenderness & knotted area should gradually fade over several days to weeks.

Answered 7/23/2018

5.4k views

Thank

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Reddish lump under armpit has been there for about two days; Semi-firm/hurts when pressure is applied. What could it be?

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Severe rash in my armpit, can you help me? About a month ago now, i got a large hard lump in my armpit. I left it alone, hoping it would go away. It got bigger and redder and started to hurt. About two weeks ago it ruptured. It had lots of pus and clear,

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I had this lump a week ago on my hip, it didn't hurt, it just itched. 2 days beforehand i had gotten flu vaccine, mmr, tetanus, and hepatitus b shots.

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