What does rain rot look like?
Good question, and I’m glad you asked. The two pictures on this page1 show what rain rot looks like from two different angles. As you notice, the hair looks rather dull and lifeless where the rain rot is. If you were to pull on those tufts of hair, they would come out very easily, and under them you would find pink skin, probably oozing a little bit. It is important to get these scabs off, as that allows air to get to the skin underneath them, which helps heal the infection. If the infection gets more severe than the infection in the picture, the horse will start to lose hair. This is extremely unsightly, though again, it doesn’t cause the horse any discomfort. Once the scabs have been removed and the skin starts to heal, it will dry up and be grey in color.