Why do you shiver when you step out of a shower into a warm bath?

Shivering when you step out of a warm shower into a cooler environment is a physiological response to temperature change. The warm water causes your body to relax and dilate blood vessels, and when exposed to cooler air, your body reacts by contracting muscles to generate heat, resulting in shivering. This response helps maintain your body's core temperature in the face of sudden temperature drops. Additionally, the contrast between the warm water and cooler air can heighten sensitivity to temperature changes, triggering the shiver reflex.