I can't think of any words to describe hypOsensitivity, although I know what it means. HypERsensitivity means oversensitive (too sensitive), so hypOsensitivty means the opposite. I am hypERsensitive to the cold, but to the heat I'm just average, not hypOsensitive nor hypERsensitive.
It's not a silly question by the way.
I don't think I have the same as you, but I have something similar, where if I get too hungry, I get this hollow feeling in my stomach, which then turns into a severe stinging acidic pain in my stomach. Once I get this pain, it won't go away, even if I do eat something or drink milk. Usually laying down helps it go. Unfortunately pain-killers does not make it go.
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Female