Pain below the testicles may be caused by diseases such as orchitis, epididymitis, chronic prostatitis, or varicocele. 1. Testiculitis: Testiculitis is mainly caused by bacteria, chlamydia and other pathogens, patients will have symptoms such as testicular enlargement, pain, ipsilateral groin and lower abdominal area pain. Testicular inflammation can also lead to testicular atrophy, and some patients will be accompanied by nausea, high fever, vomiting and other symptoms. 2. Epididymitis: Epididymitis is mostly caused by bacterial infection. The main symptoms are pain in the epididymis, swelling and hardening of the scrotum, and pain in the lower abdomen and groin. 3. Chronic prostatitis: The causes of chronic prostatitis are complex and varied, and some of them are considered to be caused by pathogenic infections. The main symptoms are pain in the perineal area, external genital area, lower abdomen, perianal area and many other places, frequent urination, painful urination, etc. Patients with chronic prostatitis also have premature ejaculation, seminal emission, pain before and after ejaculation and other manifestations. 4. Other: varicocele, ureteral stones and other diseases can also lead to the phenomenon of pain below the testicles. When the patient has symptoms of pain below the testicle, he should consult a doctor in time to identify the cause of the disease and follow the doctor’s instructions for treatment.