Weird Rash/Bumps?

Swimmer’s itch, also known as lake itch, duck itch, cercarial dermatitis,[1] and schistosome cercarial dermatitis,[2]:432 is a short-term immune reaction occurring in the skin of humans that have been infected by water-borne schistosomatidae. Symptoms, which include itchy, raised papules, commonly occur within hours of infection and do not generally last more than a week.

A number of different flatworm parasites in the family Schistosomatidae are what cause swimmer’s itch. These parasites use both freshwater snails and vertebrates as hosts in their parasitic life cycles. Mostly waterfowl are used as the vertebrate host. During one of their life stages, the larvae of the parasite, cercariae, leave the water snails and swim freely in the freshwater, attempting to encounter water birds. These larvae can accidentally come into contact with the skin of a swimmer. The cercaria penetrates the skin and dies in the skin immediately. The cercariae cannot infect humans, but they cause an inflammatory immune reaction. This reaction causes initially mildly itchy spots on the skin. Within hours, these spots become raised papules which are intensely itchy. Each papule corresponds to the penetration site of a single parasite.

The schistosomatidae that give rise to swimmer’s itch should not to be confused with those of the genus Schistosoma, which infect humans and cause the serious human disease schistosomiasis, or with larval stages of thimble jellyfish (Linuche unguiculata), which give rise to seabather's eruption. Seabather's eruption mostly occurs in salt water, on skin covered by clothing or hair, whereas swimmer's itch mostly occurs in freshwater, on uncovered skin.[3]

Since it was first described in Michigan in 1928,[4] swimmer's itch has been reported from around the world. Some suggest incidence may be on the rise,[5] although this may also be attributed to better monitoring.

Good luck...check with your pharmcist to see if there's an over the counter product you could try.

Frustrated

Ok. First of all. Don't worry. I have similar patches like this on my legs. This is just a bit more sever razor burn and it may happen if you shave and then wear stuffy or hot clothing. It shoudnt be very itch but if it is tell a doctor. No clue about that other one though.

Hi kagome_angel! I think I may know what you have: Keratosis Pilaris.

(From the web

Keratosis pilaris is a common, harmless skin condition. It causes small, hard bumps that may make your skin feel like sandpaper.

The bumps are often light-colored. They usually appear on your upper arms, thighs, and buttocks, sometimes with redness or swelling. They can also show up on your face, but that's less common.

Except for some itching, keratosis pilaris doesn't hurt and doesn't get worse. Many children and teens get it, and it usually disappears as they get older.

Causes:

Keratosis pilaris is caused by a buildup of keratin, the protein that protects skin from infections and other harmful things. The buildup forms a plug that blocks the opening of a hair follicle, but doctors don't know what triggers the buildup.

If you have dry skin, you're more likely to have keratosis pilaris. It's usually worse in the winter months, when there's less moisture in the air, and then may clear up in the summer

Look up pictures of keratosis pilaris, and you will see similar pictures to yours. So, basically you have some acne 😜