What are these little red dots on my arms?
456671
Sounds like PK. Very common.\nThe K stands for keratosis, I forget what the P stands for.\nYou get red dots or bumps on your arms sort of like pimples but they aren't.\nGet some Aquaphor cream in a tube at the drugstore. It works like a charm if you put some on the spots every day.\nIt costs about $5.\nNOthing else works for this, I know, I have it.
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.
483204
I have this weird rash on my arm. Little pink bumps. Or maybe bug bites.
1005542
I know.  I've had this before when I was younger.\n\nThis is an allergy to the sun.  You got too much sun exposure and you don't have enough vitamin A and E in your system.\n\nFirst, Start taking some multi-vitamins that contain vitamins E and A.  Do not take mega amounts, because they (especially Vitamin A) can be toxic to your liver if you overdo it.  They are not water soluble, so you cannot piss them out by drinking lots of water.)\n\nAlso please get out of the sun for a few days until the bumps go away. If you must go out in the sun cover your face with a strong sun block and wear a hat. Some make up has sun block built into it, but I doubt it will cover the bumps because they are raised and like little blisters.\n\nIf you do not really have sun bumps, other possibilities are poison ivy, German measles (don't get near any pregnant women) or an allergic rash to something else.\n\nHope this helps.
305200
I have them to. I also have them on my upper arms. They are from dry skin. I use a real loofa to scrub them really well and then I moisturize with a good lotion. In about two weeks they go away. I give the area a good scrub about once a week to keep the dry skin away.
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.
460463
My friend had benign tumors that grew in her arms. Go see a doctor!
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.
19500
Just red, with no other symptoms? That is bizarre (MD here). Gotta suspect something vascular as the primary cause, but can't tell much given that we know nothing of your broader history (immediate and past).\n\nGood luck. If any redness begins to spread upward towards the armpit, especially if there are streaks of red going up your arm, and particularly if you develop a fever, then get your behind to your doc or your local ER, OK?
599536
How big are these spots?  It sounds like you are describing tinea versicolor, which is a fungal infection of the skin.  It is most commonly located on the chest, back, shoulders, and rarely goes below the waist or above the neck.  It tends to be worse in the summer, itches when you sweat or take a hot shower, and they will not tan (which is why they are more noticeable in the summer).  The treatment is with Selenium Sulfide Lotion, which will eliminate it temporarily, although it will likely recur again at some time in the future, because this fungus is ubiquitous and grows on you because of a particular lipid that is produced by your skin.  It is not contagious, and it is not dangerous.... \n\nbut first you would need an accurate diagnosis.  A rash can not be diagnosed online.  You should check with your doctor, and they can prescribe you the appropriate medication.
126334
Sounds like an alergic reaction or heat rash. or some type of fungle infection. Acne or sweat pimples are other possibilities. Check with your doctor.
696564
they are called boils they are kind of like pimples but a little larger in some areas, apparently your allergic to some kind of mold,
243219
you should probably go to the doctor...but im 20 and i have that some times...its probably just something you're doing with your arm you know?
782976
could be sun spots, i'd definitely goto the doctor and look into that
759226
It might be warts, just a guess tho.  Just one question what color are the lumps?
412730
It is not likely eczema since that would be itchy.  Can you describe these spots more?  How long have they been present?  What parts of your body are they on?  Have you been sick or ill since these spots occurred?  How big are they?
551335
Sounds like "floaters", I think they are tiny scratches on your retina.