A hard lump above the left testicle may be due to epididymitis and scrotal eczema or folliculitis. 1. Epididymitis: generally due to the swelling and pain of the epididymis, which is an inflammation of the male reproductive system, manifested by swelling, pain and enlargement, sinking sensation, pressure and pain, fever, hard lumps and other symptoms. 2. Scrotal eczema: generally due to the scrotum part of the long-term hot and stuffy stimulation or some external factors and lead to the emergence of eczema, manifested in the scrotum red, swollen, vesicles, itching, hard pimples and other symptoms. 3. Folliculitis: generally refers to a single hair follicle infection occurs purulent inflammation, manifested as red follicular papules, pustules, itching, pain and other symptoms. A hard lump above the left testicle may also be caused by other factors, it is recommended that patients go to the regular hospital in time for treatment, and strive for early recovery.