Testicular enlargement is the result of endless multiplication and proliferation of tumor cells. The shape of the enlargement is not uniform, sometimes very irregular, and the side of the testicle with the tumor can be swollen and protrude extraordinarily. 2. The testicle is hard. The testicle looks like a stone with hard texture when touched by hand, which is significantly different from the testicle that is uniformly swollen and soft when the testicle is inflamed. Despite the hardness of the testicle, there is no pain when pressing and touching, which is also different from orchitis. Testicular heaviness Because testicular tumor is formed by the massive growth of tumor cells, it is a substantial lump. After growing to a certain extent, the weight of the testicle increases suddenly, and the patient will have a heavy downward feeling and even affect walking. If you hold up the testicle with your hand, it is like holding a stone, and there is a certain sense of weight. 4.Transmittance test negative Generally, when syringomyelia is present, the light transmission of scrotum and testicles is enhanced and the light transmission test is positive. However, if the testicular tumor grows dense and solid, and there is no liquid inside, the translucency will be greatly weakened. 5.A painless lump in the testicle 6.Pain in the lower abdomen, back or groin (the area where the thighs and abdomen are connected) 7.Sudden increase of fluid in the scrotum Experts suggest that young men aged 15 to 34 should have a monthly testicular cancer self-examination, and the best time to do so is in the shower. The best time to check is in the shower. Hold one side of the testicle with each hand and touch it with your thumb while moving your other fingers to check thoroughly for lumps or any differences in touch or appearance. The secondary testicle is located behind the testicle and has a harder texture, which can easily be mistaken for a tumor. If there is swelling or pressure pain, it may be a symptom of testicular cancer.