From experience, when I would go through my bouts, I would either not eat or eat all the time. When I wasnt eating, I just felt like I didnt have the energy nor did I care. And I wasnt hungry. And of course the opposite happened as well but everyone is different. Whoever is going through this, should really talk to someone if they are unable to snap out of it. When it gets to the point that you dont eat, you may need some medical help.
Maybe just at that time your feelings are so scrambled and feeling distressed...tighten the inside of the body to make you not want to consume anything. While some have no problem devouring food while they are depressed. Its a daily thing....instead of eating heavy meals, while depressed, try to drink at least one veggie/fruit Smoothie(Fresh Fruits and veggies) just to keep your immune system up and running while your down and out. I hope that your bout is only temproary and that you feel better.
From experience I can say I had a really low point in my life!! When I lost my mom I just gave up nothing seemed important I didn't feel anything. You don't feel hungry you just feel numb!! The sight and smell of food almost made me sick to my stomach!! Its just the combination of all this emotions and for me the one thing I had control of was whether or not I was hungry
It really has something to do with the chemicals in the brain like seratonin, etc i have been researching depression and the chemicals in the brain and in one of my unscientific studies I have found that most people I studied tend to eat really spicy, hot foods. Probably because it increases levels of certain chemicals. I have a lot of resources in this area because I have bipolar quite badly and go to support groups with a lot people.