Hello, Burning sensation around the testicle is commonly due to epididymitis. Epididymitis is caused by bacterial infection. Since you are sexually active, it could be due to STI s, such as gonorrhea or chlamydia. Sometimes, a testicle also becomes inflamed called epididymo-orchitis. You are suggested to get clinically examined by a Urologist or GP. Get assessed and evaluate. You may need surgery apart from medicines. Get STD tests done to detect STI. If reports are positive you may need antibiotics and antivirals. However, other medical conditions that may cause burning sensation are kidney stones, orchitis, UTI, testiculatr torsion or tumor, inguinal hernia, etc. Get blood tests, urinalysis (R/E & C/S), CT, Radionuclide imaging, etc done. Your treatment will depend on the pathology detected. In the meantime you can take pain medications & anti inflammatory for relieve. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician