Can I get pus-filled bumps on my body after traveling and swimming in a hot climate?

Hi doctor,

I am currently traveling in a very hot and humid climate and have been swimming a lot. Two days ago, I woke up with red bumps on one side, which appeared fairly localized. The bumps got darker within a day. Now there are a couple of bumps that have pus, and they look like whiteheads. The spots are not itchy but can be sore when I apply pressure. At first, I thought it might be bed bugs, but I did not see any evidence of bed bugs in the hotel room when I searched it thoroughly. I have been in contact with a dog, so flea bites may also be possible. I recently completed (a month ago) taking Epuris for cystic acne. I have never had acne on my waist before. There has been one report of streptococcus in the area that I was swimming in, possibly folliculitis. I am unsure as I have only baby hairs in that area of my body. I have no other symptoms like fever, chills, upset stomach, etc. In two days, the bumps have slowly become more pronounced and dark red but are not spreading to other parts of my body. I am also not allergic to anything. I am not taking any medications except acid reflux medications, which I have been on for a long time This has never happened to me before.

Thank you.