Inflammation of the prostate gland, which is set beneath the bladder and partially encloses the urethra in men and boys. If the condition develops quickly, it is usually caused by an infection elsewhere in the body which reaches the prostate via the blood. For example, bacteria originating in the urethra can be associated with the venereal disease gonorrhoea. Prostatitis causes severe pain in the area between anus and penis; the pain can be such that the patient is unable to urinate. Treatment with antibiotics is necessary to control the infection, which can also be chronic, with vague back pain, pain between anus and penis and the need to visit the toilet increasingly frequently. This form of the disease is also caused by bacteria, possibly including the tuberculosis bacterium. A typical feature of chronic prostatitis is that the condition recurs as soon as treatment with antibiotics stops, even after years. If the symptoms are severe