A hard lump next to the bladder may be caused by bladder stones, inflammatory masses, lipomas, bladder tumors, pelvic or uterine diseases. 1. Bladder stones: urine retained in the bladder for a long time can not be discharged, which will form stones, resulting in hard lumps in the bladder position, accompanied by local pain symptoms. 2. Folliculitis: Infection of hair follicles with bacteria will lead to inflammation of the skin, clinically manifested as inflammatory follicular papules accompanied by pain. 3. Lipoma: Lipoma is a benign tumor that can occur with systemic or localized infections. It can occur in any fatty area, with medium hard texture and some soreness when pressed. 4. Bladder tumor: bladder tumor may be triggered by factors such as nitrite, smoking, high-fat diet, etc., which may lead to bladder symptoms such as hardness, local pain with hematuria. 5. Pelvic or uterine diseases: there are many tissues around the bladder, when suffering from pelvic inflammatory disease or uterine pathology will appear hard lumps on the side of the bladder. When there is a hard lump next to the bladder should be timely to the hospital to check the specific cause of the disease, in the doctor’s advice to manage, so as not to delay the condition.