The patient’s diagnosis would be acute testicular torsion, which is a medical emergency. The patient should be managed with immediate surgical intervention, as delaying treatment could result in potential damage to the testicle. Once the patient has been stabilized and treated, it is important to monitor for any potential complications such as infection or loss of fertility. It is also important to provide emotional support and comfort to the patient after surgery, and to educate him and his family on the importance of protecting and caring for the affected testicle to ensure best possible outcomes.