Is Your Bath Giving You The Itch? - Toxic Beauty

Soaking in the bath leaves the skin, urogenital and anal areas exposed to the harsh agents (such as SLS) used in shampoos, bubble baths, soaps, and other such products. This can trigger urinary tract infections in sensitive individuals (particularly babies and children) by stripping away the delicate protective mucus that lines the genitourinary tract. 

The FDA has received numerous complaints from consumers about itches, rashes and urinary tract problems following the use of bubble baths and soaps. In the USA children's foaming bath products must bear the following warning: Caution: Use only as directed. Excessive or prolonged exposure may cause irritation to the skin and urinary tract. Discontinue if rash, redness or itching occurs. Consult your physician if irritation persists. keep out of the reach of children.

Reference: Toxic Beauty: Dawn Mellowship