Evidence suggests that thin boundary people are highly sensitive in a variety of ways and from an early age:
React more strongly than do other individuals to sensory stimuli and can become agitated due to bright lights, loud sounds, particular aromas, tastes or textures.
Respond more strongly to physical and emotional pain in themselves as well as in others.
Become stressed or fatigued due to an overload of sensory or emotional input.
Be more allergic and their immune systems are seemingly more reactive.
Be more deeply affected -- or recall being more deeply affected -- by events during childhood.
In a nutshell, highly thin boundary people are like walking antennae, whose entire bodies and brains seem primed to notice what's going on in their environment and internalize it. The chronic illnesses they develop will reflect this "hyper" style of feeling. -