Saddle sores are painful skin lesions that can form on parts of the body that are in contact with a bicycle seat. Treating saddle sores may involve applying topical ointments and staying off your bike to let them heal. For more serious cases, medical attention may be appropriate.
You can reduce your risk of developing saddle sores by installing the new SaddleDonut-Pro
So your body does not rest all its weight directly on the frame through the ischium, but rather it has a larger support area and it distributes the weight evenly.