Tiny red bumps that itch and seem to be spreading down both of my arms?

See your doctor. Problems like these can only be correctly handled by your doctor in person. He/she needs to listen to you, perform an examination and possibly run labs or other tests. That's the only way he/she can find out what's going on and what to do about it.

Related Questions

My daughter has been suffering with a thick rash under her ares and it itches very bad. Yesterday she appeared with red bumps under her arms and chest?

See your doctor. It is difficult to diagnose rashes without seeing them. Since it s thick and now spreading, she would be helped with a visit. Cannot tell if it is a contact irritation or a food sensitivity or eczema or other allergic type rash without seeing it. Read more...

I have a rash on my upper arms, armpits, breasts, back and its the worst on my stomach and tighs. It looks like red bumps, but it hardly itches at al

Difficult to assess. Rash descriptions are difficult to diagnosis without examination or an image. Please consult your primary or with us via Prime. Read more...
Pityriasis rosea? This rash, which often follows a viral or upper respiratory infection, often begins with a single patch, classically on the abdomen or armpit. It then spreads to the extremities. Only about 1/4 people suffer from itching. No treatment is usually required, especially if there is no itching. UV light/sunlight may speed recovery. It usually resolve in a matter of weeks, but up to 6 months. Good luck. Read more...

I have small red bumps no itching all over my arms what could it be?

Many things. It could be simple things such as a folliculitis or keratosis pilaris, both of which are benign conditions. It would be useful to know how long they have been there and what they look like. Read more...
KP? Keratosis pilaris probably. Try daily exfoliation and then gentle moisturizer without dyes or scents. Read more...