 [ Symptoms ] if i have health insurance through my employer will i be required to pay for a marketplace insurance plan [ Disease ] i do not know the age or health status of your daughter but shower fainting is not that uncommon it either is orthostatic hypotension lowered blood pressure when she is in hot water and all of her blood starts pooling toward her legsfeet or perhaps even a vagal response where the blood pressure is lowered when she holds her breath washing hair and face a few suggestions shorter less hot showers and get a shower seat so she can sit also make sure she is not dieting and throwing off her electrolytes