Hi, i am 33 year old. i saw red spots on my left breast skin which come and go away after some days. should i be concerned? is it okay for skin to become red sometimes. i am not sure whats causing it. i have dermatitis on my back currently. thanks?

Skin irritation: Transient red coloring of skin is often a reaction to local irritation by a chemical (cream, oil ) or an object like rough clothing: investigate the offending cause and remove it to get a relief. It may also be caused by a bug bite or infection. If the redness persists, it may signal inflammation (dermatitis) that needs to be addressed as you are probably doing with the "dermatitis of your back".