There are two ways in which bladder infections can occur when cycling: Firstly, through mechanical influences resulting from the wrong seat height, saddle angle or an unsuitable saddle. This can lead to unpleasant pressure on the urethra and bladder. The emptying of the bladder is painful, and occasionally blood is mixed in due to the irritation and constriction of the urethra. Secondly, cystitis can be caused by a bacterial infection: The aforementioned coli bacteria actually enter the urethra from the outside. They are located at the anus and can migrate to the urethra through movement while cycling and sweat. As your inflammations have always been treated with the same antibiotic containing the active ingredient cotrimoxazole, it is possible that the bacteria have become resistant to it. If your bladder infection recurs, switch to a highly effective urinary tract antibiotic that you take for ten days. To avoid future bladder infections, make sure you are riding in the correct position on a suitable saddle. Keep your cycling shorts clean, especially the seat pad, and always flush your bladder well by drinking plenty of fluids regularly.
