Hello dear, Pain in the testicle can be attributed to: 1. Trauma 2. Inflammation/infection. 3. Varicocele 4. Hydrocele. In your post you have not mentioned about any history of trauma. So, an infective or inflammatory cause can also be thought of, such as orchitis or epididymo-orchitis. Under such condition, you need to take antibiotics along with analgesics under the guidance of a Urologist. Investigation like Complete blood count, Urine analysis & Ultrasound scan of the scrotal region will be helpful in clinching the diagnosis. Kindly let me know if you have any further queries. You can ask me a direct query on this website using the below link: http://www.healthcaremagic.com/doctors/dr-polash-sannigrahi/64925 Wishing a Good Health. Thanks & take care.