Hidden testicular pain may be caused by orchitis, varicocele, epididymal tuberculosis, etc., and should be promptly consulted to find out the cause. 1. Orchitis: an inflammatory disease of testicles caused by bacterial or viral infection, mainly manifested as redness and swelling of the affected scrotum, testicular pain, which may be accompanied by fever, chills, nausea, vomiting and other systemic symptoms. 2. Varicocele: a kind of vascular lesion, which may be related to congenital developmental abnormality of the spermatic vein, involvement of acquired diseases, heredity and other factors. Patients are usually asymptomatic and easy to be neglected. In serious cases, the scrotum on the affected side may be enlarged, accompanied by swelling and hidden pain. 3. Epididymal tuberculosis: tuberculosis bacteria usually from the kidney to the prostate, seminal vesicles, and then to the epididymis, but also some through the bloodstream due to infection, the patient often have a feeling of scrotal distension or pain, can touch the epididymis is enlarged and thickening of the vas deferens. This symptom alone is not enough to diagnose the disease, do not rule out that it is caused by other factors, such as prostatitis. It is recommended that the patient consult a doctor in time to clarify the cause of the disease and give targeted treatment.