How can the testicles themselves be clear?

  The best time to check your own testicles is after a shower, when the skin of the scrotum is most relaxed and the examination is easier and more accurate. This is because any local tension will cause the scrotum to contract and interfere with the examination.  The first step is to hold the testicle flat with your hand and feel the weight and texture of the testicle The second step is to fix the testicle slightly with one hand and palpate it with the other hand, with the thumb on the upper part and the index and middle fingers on the lower part, and gently touch the testicle, if you feel a lump, you should be alerted and go to the hospital for further examination in time.