It's not really a disease. The only reason a penis bends or curves is non-symmetrical tissue.
Next Steps
Aggressive masturbation (always with the same hand) or tight clothing can continually pull a penis to one side. This eventually can stretch the skin on just one side of the penis. When that happens, the penis will bend the other way on erection because one side is able to get longer than the other.
Health Tips
To know more about this problme you may also get in touch with Oorja Clinic experience doctors who will help you recover your problem in best possible way.