One theory is that this dump of
cortisol constricts the blood vessels in our stomachs, leading to a decreased appetite.4 An abundance of cortisol can also cause insomnia5 — so if that person's on your mind and you can't eat or sleep it may be time to embrace the vulnerability and admit that you're in love.
Grief - related stress can increase
blood pressure and heart rate, raise levels of the stress hormone
cortisol,
constrict blood vessels, and disrupt cholesterol - filled plaques that line arteries.