Why do I keep getting bumps under my arms at least once a month? They hurt for a few days then they shrink.?
367678
If the bumps are under the skin it is probably lymph nodes.  Some people call them swollen glands.  They could be caused from some infection in your body, or virus.  Or you could have glandular tissue that gets swollen and tender around your menstrual cycle.  Limiting caffeine can help ease the pain.  Probably nothing to worry about.  If you have swollen painful glands in other parts of your body (neck, groin area) then you probably need to get the doctor to feel them and check them out.  Good luck
1031076
Maybe you have sensitive skin. Be sure to always use a new razor, but in your case it will probably still irritate the skin. I would suggest letting it grow out and then prepare for pain...waxing! The results will last for weeks and hopefully you won't be red under the arm for more than a few hours.
203091
don't worry, it is skin... it can get pimples... just means the pores are getting clogged with oil or dirt... shaving will increase the bumps... those tend to be pimples or ingrown hairs... your skin emitts natural oils, so if you excersise a lt, or walk alot you can be more prone the the pimples down there...
439093
If they are on you upper arms, they are probably okay.  Someone told me that if you consume a lot of dairy products, you will get those red bumps.  You can go to the dermatologist if it bothers you.  I'm sure its nothing though.
795877
Honestly you should go to the Dr. \n\nThere are any number of reasons you get spots on your palms. \nJust a few are allergies, eczema and psoriasis though if you've been camping recently it could be lyme disease. \n\nYou mihgt not to party this week or drink too much. But you should also see a dermatologist.
320177
if they are small, raised, skin-colored bumps they are probably an allergic reaction.  I have these as do both my sons.  The doctor has explained that it is a mild allergic reaction.  You can look at what soaps and detergents you are using and see if it helps...but i have had them since i was a child and they have never gone away.
1048667
You may have hidradenitis suppurativa (H.S.). It's a rare skin condition that lacks research and knowledge by health officials.\n\nClick on my name and check my related posted question.\n\nClick on these links to educate yourself on this condition.
698766
If you're worried, obey your instincts and see a doctor.  \nIt could take longer than 3 weeks for a percussive bump to heal under the skin.
463365
It's a condition, you need to go to a dermatologist and get treatment for it.  I have pretty much the same problem.  I know for the underarms you can get botox that will last for approx 6 months and stop the sweating.  I know how embarrassing it is to walk around with pit marks under your arms in the winter time even, hard to find deodorants that work well, which by the way, I learned that switching back and forth from Dove to Degree helps some, but go to the doctor and see what they can do for you.  It's called hyperhidrosis.  http://www.ineed2know.org/sweating.htm  I hope this all helps and I feel for you, since I am there with you!!!  Good luck!
862125
It's not because youre fat.  You are overweight, but youre not obese.  They are most likely from your body growing rapidly and your skin can't keep up with it.  As another person said, coca butter is the only thing that will help, but dont expect them to go away.  I have them too, since I was 12 and I'm 23 =(
243584
Any time you have recurrent pain you should see a doctor. It could be a headache, tumour (unlikely) or something hormonal you never know. As for pimples you wouldn't get a pimple in the same strange place evry month for a week.
808680
maybe the bra your wearing those nasty wires tend to move then it sores the breast for days hint buy a good bra & hand wash it & air dry it, if you feel lumps get checked for cancer,if your going through mentapause thats just nature changing your body, if your having un protected sex may be pregnant some women as they say carry baby in there breast then too you can experince the soreness before,durring,or after your monthly cycle
571933
Kind sounds like it may not be heat bumps at all.\nHeat bumps go away soon after being cooled. An A/C'd room, wiped down with an icy/water rag...\nBut you would need to consult a dermatologist to be sure. Not a general doctor they don't know as much as the skin dr. does.
745848
Mine tends to, especially when I shave.  I read that its tiny hairs curling under the skin that causes the red bumps, when they're shaved to close to the skin that is. . . .
553163
Possibly something has gotten under your skin, such as a tiny splinter or other irritant without you realizing it, and the bump is your body forming scar tissue around the "foreign object". This is just one possibility of many. Without seeing it or having more details, it's really hard to tell what it is.
814561
It could be a pimple or cyst forming under the skin.  I would wait a couple of days to see if it goes down or goes away and if there is no change, see a doc...
750516
Inside under the arm or outside? My comments below are in regards to inside and under the armpit.\n\nThen this  could swollen lymph nodes - which indicates that some process is going on in your body.  Normally those swellings disappear if the problem is temporary, like a sever flu. And then they are on both sides of the body and you notice the problems in general. \n\nNow - your knot is only under one arm, right? And it is not going away? You do not have an ongoing infection at your hand/nails/arm?  I do not want to make you overly concerned - but it could be a sign of a very serious issue. If I would be you I would have a doctor check it out. \n\nPlease note - all of that only refers to the assumption that the know is under the armpit and inside.