Urinating in a standing position might hinder the proper relaxation of the pelvic floor muscles, potentially leading to incomplete bladder emptying. This incomplete emptying can increase the risk of urinary tract infections (UTIs) and other related urinary problems.
The Pros and Cons of peeing in the shower

Considering the wealth of information available, it’s vital to assess the advantages and disadvantages to make an educated choice regarding the decision to urinate in the shower:
Advantages
• Substantial water conservation: Urinating in the shower has the potential to save a significant volume of water on an annual basis.
• Swiftness and convenience: For many individuals, this choice is based on its convenience.
Disadvantages
• Potential health implications: Urinating in the shower might contribute to issues like pelvic floor dysfunction and bladder control problems.
• Connection to flowing water: There’s a potential risk of developing a conditioned response, which could result in involuntary urination upon hearing the sound of running water.
• Not entirely sanitary: Despite urine being mostly sterile, it can still contain harmful bacteria, potentially elevating the risk of infections.