The testicles seem to have a hard lump, it is recommended to go to the hospital for relevant examinations to clarify the possible causes: 1, testicular inflammation or epididymitis, after inflammation there will be local scarring nodules, so there will be a hard lump when touched, it can be located at the back of the testicles, or the bottom of the testicles. The inflammation will gradually subside before a hard lump can be formed. 2. Testicular tumor, when the testicle volume increases with hardening texture, it seems that a hard lump can be touched. It is recommended to go to the hospital for CT or testicular tumor index examination to confirm the diagnosis.3. After the tuberculosis of the testis or epididymis, a hard lump of fibrous scar can be formed locally, accompanied by testicular syringomyelia or hardening of the vas deferens, especially in patients who have suffered from pulmonary tuberculosis and need to go to the hospital for Mycobacterium tuberculosis examination to confirm the diagnosis.