What are red spots on arms?

Cherry angiomas. Could be broken blood vessels or cherry angiomas which are vascular lesions. Red spots can also occur with drug reactions or other types of rashes. Did they suddenly occur or been there a long time makes a difference in the diagnosis.
Many possible. causes. These lesions would likely need to be examined and more history obtained to be able to provide you with useful input about the diagnosis or possible treatment.

Related Questions

I started to find very small red spots on my arms! What old this be?

Dermatology. Is a visual specialty, but to take a stab at it could be hemangioma a or small clusters of blood vessels. Common as we age and not serious. If they are flat could be petechiae from low platelets and that would need more evaluation. Read more...

I brake out from bleach I have red spots on my arms what should I do?

Extra rinse. If the rash is from residue of bleach in your clothes, you may try putting an extra rinse cycle in the wash. You could omit bleach entirely from the wash as the current detergents are generally good at cleaning clothes without bleach. Read more...