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Underarm Lump
I have a lump in my left armpit, only about the size of like a bad bug bite, but it's rather sore and painful. As far as I can tell, I haven't changed anything in my routine; no new products or environments that I've used or visited. And, though my skin is generally sensitive, I have no allergies. I've always been told to check for lumps around my breast and underarms, because of cancer. But I'd always thought that a cancerous lump would be located in the deep tissue or something, not on the surface of my skin.

I'm 18, so I know the chances of it actually being any sort of cancer are probably slim to none, but there is a history of it in my family. I'm in good health and a vegetarian (don't eat beef, pork, fish, or poultry, but I do eat eggs and dairy products). Also, though I doubt it's relative, I've had a continuous headache for over three days now, but no other symptoms.
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Hi,
An underarm lump can be most probably due to an infective condition. You could have it due to shaving or waxing or using a deodarant. Wait for a few days and see if the lump resolves. If it persists consult your physician for a clinical evaluation. The headache could be caused due to stress. Try some OTC painkillers for a few days. Goodluck.
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Hi,

Unerarm lump can be caused by viral infection, allergic reaction, a swollen lymph node or a benign tumor like lipoma. There are many other possibilities too. I suggest you get yourself physically examined by a physician
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I had a lump in the armpit - I had been picking at a mole and got an infection. It was about the size of a big marble.  Went to a surgeon who lanced it. It turned out to be C-MRSA type staph infection.  No fever, just really really tender. A C-MRSA infection is Serious so don't wait.
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