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Doctor insights on: Painful Cyst On Arm

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Cyst (Definition)

A cyst is a structure or mass that consists of a cellular lined sac. It is typically filled with fluid but may be filled with solid material. It can be congenital, traumatic, or acquired. They may develop nearly anywhere in the body and usually require complete excision for eradication or they are likely to recur. Fluid filled sacs that are not cellular lined ...Read more


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I have a lump under my left upper arm and was told it's a cyst it's painful and swollen twice the size of my right upper arm pain going to my shoulder?

I have a lump under my left upper arm and was told it's a cyst it's painful and swollen twice the size of my right upper arm pain going to my shoulder?

See a doctor: You need to get this checked out. I would suggest you start with your primary care provider this week. Hope this helps! ...Read more

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I have several non-painful 'cysts' on my lower back, ribs, stomach, arm and legs. What causes this?

I have several non-painful 'cysts' on my lower back, ribs, stomach, arm and legs. What causes this?

Sounds like : Epidermoid inclusion cysts. Direct cause is plugged hair follicle. You might have oily skin as underlying cause. These will eventually get infected, so you should have them removed. Consult dermatologist for oily skin. Or they could be something else, if you have so many of them. Show them to a doctor. ...Read more

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Had breast u/s showed multiple fibroadenomas, complex cyst and bilateral axillary lymph nodes enlargement. Painful breast+ arm with edema. Possibly?

Had  breast u/s showed multiple fibroadenomas, complex cyst and bilateral axillary lymph nodes enlargement. Painful breast+ arm with edema. Possibly?

See specialist: You have a "busy" breast and with your young age it is probably dense as well. I highly recommend you find a breast specialist who can review the films and examine you. I have several other posts on Fibroadenoma and Cystic changes (Fibrocystic) that you can review. Good luck. ...Read more

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Got a very painful, bump/cyst-like thing in my armpit. Can see a bit of redness, less than size of dime. What could it be & how do I treat? Hurts!

Got a very painful, bump/cyst-like thing in my armpit. Can see a bit of redness, less than size of dime.  What could it be & how do I treat? Hurts!

Most common: cause for such lump in armpit is a plugges SEBACEOUS CYST. This may require opening and drainage by a surgeon (although most family physicians perfrom such surgery) In the meantime HOT WET PACKS (or lying back in a hot tub) may encourage opening and draining "on its own". Hope this helps! Dr Z ...Read more

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What doctor I should see for a painful cyst under my armpit?

What doctor I should see for a painful cyst under my armpit?

Cyst.: For a painful cyst under your armpit, try seeing your primary care doctor first. You may need an antibiotic. Your PCP may even be able to drain it for you if necessary. If you have recurrent painful swollen cysts, you may need to see a general surgeon to have them removed. ...Read more

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Lump under armpit for five months and doc said was a cyst. Not painful and large. Doc didn't do anything but told me to keep watch until it hurts.

Lump under armpit for five months and doc said was a cyst. Not painful and large. Doc didn't do anything but told me to keep watch until it hurts.

Lump: I would suggest you see a surgeon. This could be a simple benign cyst but could also be an enlarged node. If its a lymph node that would be abnormal and deserves further workup. ...Read more

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I have a lump under left armpit, dr thinks it's only a cyst i go for test tomorrow, it's painful could this be cancer some say cancer doesn't hurt?

I have a lump under left armpit, dr thinks it's only a cyst i go for test tomorrow, it's painful could this be cancer some say cancer doesn't hurt?

You are right: Cancer commonly is a painless bump/lump. But some tumors can be tender. Armpit is prone to get infection in the hair follicles which can produce a red, tender painful lump but it usually settles down in one to two weeks. Breast cancer, of course can spread to the lymph nodes of the armpit and produce a firm, painless lump there. That is what you need to be sure about. ...Read more

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Had an abscess drained from my armpit on 7/20. I still have a hard lump and painful. Could it still be an abscess there or cyst?

Had an abscess drained from my armpit on 7/20. I still have a hard lump and painful. Could it still be an abscess there or cyst?

Residual disease: Well that should be re-examined by the doctor who cut into it. If it was a surgeon, I expect they will do a proper job in re-exploring the area and taking the necessary action. It's possible the abscess arose from an infected cyst, or there could be some undrained portion that wasn't reached in the first procedure. Hopefully you can go back ASAP to get that looked at. ...Read more

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I've had a painful sebaceous cyst inside my armpit for 3 months now. It just recently ruptured & draining nonstop for 4 days straight, what can I do?

I've had a painful sebaceous cyst inside my armpit for 3 months now. It just recently ruptured & draining nonstop for 4 days straight, what can I do?

Let it stabilize: I'm sorry it ruptured. The keratin and/or sebum in the cyst promotes bacterial overgrowth and greatly interferes with healing. You should get with your physician now for possible antibiotic treatment; you may need surgery when things settle down. ...Read more

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A small (pea sized) painful cyst in my left armpit (antiperspirant use )gradually its moving downward & swelling whereever it stays .now it is in palm?

A small (pea sized) painful cyst in my left armpit (antiperspirant use )gradually its moving downward & swelling whereever it stays .now it is in palm?

Foreign body: It sounds like you are having a foreign body reaction. Somehow, inert material has entered your skin in the axilla/armput, has stimulated an inflammatory "foreign body" (term given to anything not "native" to your body) reaction, & now traveled to your hand. Why? I don't know. You can safely watch it (as long as you do not feel sick at all) or have it removed. Good luck! ...Read more

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Tips on child cyst on arm removal?

Tips on child cyst on arm removal?

It depends: It really depends on the type and location of the cyst. If it is in the skin, a dermatologist will likely be able to help. Some cysts are deeper down and will require a surgeon, or an orthopedic surgeon to address. Many cysts in children are benign and if not causing a problem, it might not even need to be removed. Start off with a consult with your pediatrician or family doctor. ...Read more

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How would you know if you have a cyst in arm?

How would you know if you have a cyst in arm?

Get evaluated: You can feel a subcutaneous nodule non adherents to the skin usually non tender.May be hard to differentiate from lipomas in inexperienced examiners. ...Read more

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I have under each arm pit a knot or some sort of cyst. I would like to know if this could be a result of doing a lot of exercise or what?

I have under each arm pit a knot or some sort of cyst. I would like to know if this could be a result of doing a lot of exercise or what?

Prob.not: Axillary lymph nodes are most common in the location you are describing and are not related to exercise .If they are painful, tender or enlarging see your pcp for evaluation ...Read more