sometimes these bumps look red, but not itchy or anything.
205837
Condition is keratosis pilaris.  Glytone makes a kit for this but expensive.  Try the teen health site for more economical use of alphahydroxy moisturizing lotion; exfoliating wash.  Common name is: chicken skin
612523
Flea bites are itchy, not very big but never made lumps on me.  Try putting alcohol on them.  You got into some kind of bug. If they don't start fading in a couple of days see a doctor. Guess it could be fleas and you just react differently.
160960
Samll red bumps on arms are PK. the K stands for keratosis, I forget what the P stands for.\nI have this common conditon. Aquaphor on the bumps every day makes them go away. It costs $5. at the drugstore. It is the only thing that works.
538830
They might be keratosis pilaris.  I have the same thing.  Here is a link:\n\nhttp://www.aocd.org/skin/dermatologic_diseases/keratosis_pilaris.html\n\nI find that Eucerin Redness Relief Cleanser and Lotion works well on it.
53887
It could be an infection or polyps.
189473
It could just be irritation bumps or ingrown hair bumps. Their is a laser that could get rid of the bump in one shot.
599339
Possibly birthmarks but you should have a doctor check them out.
342550
it does not look different, it may be a temperature thing
183199
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?
432510
You might have shampooed too hard and caused an ingrown hair.  They cause big ol' bumps--like pimples, too.  Get somebody to check it and see if there is a hair wanting to be pulled out with tweezers.  ONLY if there IS a hair!!!
327261
They will look like someone that isn't scratching their armpits fron side to side.
69143
This is what I think you have. I suggest going to a Dermatoligist to determine what this is.  It could be an allergy.  It could be an infection.  But I also have these red bumps.  All over right now because of the cold weather.  When I get cut, when I get hot, when I am cold, when I run, they itch, burn, and hurt.  I use hydrocortizone to cure the itching.  I hope you find the answer your looking for.\n\nKeratosis pilaris (KP) is a very common genetic follicular disease that is manifested by the appearance of rough bumps on the skin and hence colloqually referred to as "chicken skin". Primarily, it appears on the back and outer sides of the upper arms, but can also occur on thighs and buttocks or any body part except glabrous skin (like the palms or soles of feet). Worldwide, KP affects an estimated 40 to 50% of the adult population and approximately 50 to 80% of all adolescents. It is more common in women than in men. Varying in degree, cases of KP can range from minimal to severe.\n\nThere are several different types of keratosis pilaris, including keratosis pilaris rubra (red, inflamed bumps), alba (rough, bumpy skin with no irritation), rubra faceii (reddish rash on the cheeks) and related disorders.\n\nMost people with keratosis pilaris do not know they carry it. While KP resembles goose bumps, it is characterized by the appearance of small rough bumps on the skin. As a result, it is often confused with acne.\n\nKeratosis pilaris tends to occur as excess keratin, a natural protein in the skin, accumulates around hair follicles (process known as hyperkeratinization). Unattractive more than anything else, it most often appears as a proliferation of tiny hard bumps that are seldom sore or itchy. Though people with keratosis pilaris experience this condition year round, it’s during the colder months when moisture levels in the air are lower that the problem can become exacerbated and the “goose bumps” are apt to look and feel more pronounced in color and texture.\n\nAlthough exfoliation, intensive moisturizing cremes, and medicated lotions containing alpha-hydroxy acids or urea may improve the appearance and texture of affected skin, results are not permanent. There is no known cure for this condition
535476
Did you have the little white bumps when you went to the doctor?  Herpes can start out looking like pimples.  Don't mean to scare you, but you should go back to the doctors.
545863
Could really be anything. Did you have unprotected sex lately? Are you stressed? Are you really acne prone? You don't need to tell your parents at all but you should at leats go to the walk-in clinic soon if these bumps get worse or don't go away.
400335
Red lines can be a sign of infection. Get them check out by a doctor.
117806
It COULD be ingrown hairs. A skin specialist will tell you if they are or not. Many people who sit around a lot (drivers, office workers) get a few ingrown hairs there, and they can end up like pimples.
433362
little red bumps are little ingrown hairs.\ndont shave against the growth anywhere - armpits are the most common wrong way shave - shave up, not down.\nYou can get ingrown hair removing lotion that may help.