Itchy swollen ashes on the breasts and buttocks after tanning.Are these symptoms of herpes?

based in the locations and timing of the rashes that you have, I don't think it is at all likely that you have herpes. it is much more likely that the rash is due to yeast, or due to a reaction to some some substance that irritated your skin or that you may have had a reaction to. that could have been some sort I cleaning detergent or maybe a perfume or body cream that someone else used before you used the bed if it wasn't cleaned properly. if the rash persists, you should see your doctor and he/she can probably figure out what it is by examining it. I hope this helps, please let me know if you have any more questions.