Male bladder infections are usually accompanied by an infection of the prostate, also called prostatitis.
Typical complaints include a burning sensation when urinating, frequent urination, a weaker urine stream, pain
in the lower abdomen or genital region and high (shivering) fever.

The diagnosis is made on the basis of this typical symptom pattern in combination with a painful rectal
test of the prostate and a urine sample (and blood sample) that indicate an inflammation of the prostate. In some cases, a transrectal ultrasound can be performed for confirmation.
In contrast to a urinary tract infection in the woman, there is often an underlying abnormality in the man
(prostate enlargement, narrowing of the urethra, ...). 

In addition to tackling any underlying abnormality, the infection itself usually involves a course of antibiotics in combination with pain relief.