There are more causes of testicular swelling and pain, and the common causes include inflammation of the testicles, such as orchitis, epididymitis or varicocele, testicular cyst, testicular syringomyelia and even testicular tumor, all of which can cause testicular swelling and pain. If the symptoms of testicular swelling and pain appear, it is best to be able to go to the urology department of the hospital first for an ultrasound examination of the reproductive system; if it is caused by inflammation, this situation requires timely anti-inflammatory treatment. If it is caused by varicocele or testicular syringomyelia, surgery is recommended. If it is caused by testicular tumor, an obvious lump will be felt on the testicle, which also needs to be surgically removed as soon as possible.