The pink stuff in your shower is most likely a bacterial colony called Serratia marcescens, which produces a biofilm that can appear pink or even red in color. This bacteria is commonly found in water and dirt and is airborne, making it easily blown into homes on a daily basis. The bacteria thrive in damp environments and grow by feeding off fat and mineral deposits from soap scum and shampoo. While the bacteria can cause issues like urinary tract infections or intestinal issues if they enter the body, it is mostly harmless for the average healthy person.

To get rid of the pink stuff in your shower, you can use a soft scrub brush and a cleaning solution of 50-50 warm water and white vinegar to remove the residue. Let the solution soak for 10 minutes before scrubbing and then try to keep the area as dry as possible moving forward. Other cleaning solutions that have been suggested include a paste made of baking soda, blue dawn soap, and peroxide, or using a product like Scrubbing Bubbles Shower Foamer.