21st Century Boy demonstrates how to check yourself for testicular cancer. After a warm bath or shower, lift up your leg and rest it on the edge of the bathtub. Lift up your right testicle with your left hand and take the thumb, forefinger and index finger of your right hand and check the testicle. Switch hands and repeat the process for the other testicle. There should be a soft lump at the front and the back of the testicle. There should also be a smooth, firm tube running up the side. If you find a lump somewhere else and there isn't a similar lump on the other testicle, consult your doctor but don't panic.