testes , caused by infection (most often mumps ) or chemical or physical injury.
The testicles' rich blood and lymphatic supply block most infections in the absence of severe injury. Usual symptoms are high fever, sudden pain in the testicle, nausea and vomiting, and swelling, tightness, and tenderness of the gland. Fluids with pus or blood may accumulate in the scrotum, which is generally red and thickened. Treatment may include antibiotics, bed rest, support of the testes, compresses, and surgery or drainage.