Fresh blisters in a swimming pool?

Swimmers itch, also called cercarial dermatitis, is a skin irritation caused by an allergic reaction to microscopic parasites that live on waterfowl and other animals. These parasites, known as schistosomes, release larvae called cercariae into the water. When cercariae come into contact with human skin, they can penetrate the skin and cause an allergic reaction. Symptoms of swimmers itch include itchy, red bumps or blisters that typically appear within a few days of swimming in infested water. The rash can last for several weeks and can be very uncomfortable.

To avoid swimmers itch, it is important to avoid swimming in areas where there are known to be high levels of schistosomes. These areas include shallow, warm water bodies with a lot of vegetation, such as ponds, lakes, and slow-moving rivers. It is also important to avoid swimming in areas where there are a lot of waterfowl, as these animals are the primary hosts for schistosomes.

If you do develop swimmers itch, there are a few things you can do to relieve the symptoms. These include:

* Applying a calamine lotion or hydrocortisone cream to the affected area

* Taking an oral antihistamine

* Avoiding scratching the rash

In most cases, swimmers itch will clear up within a few weeks. However, if the symptoms are severe or do not improve after a few weeks, it is important to see a doctor.