If you have a real low--you eat. PERIOD. No messing around. Or as Zoe asked, you are just not hungry at "designated meal time?" She is correct--you SHOULD be able to not eat at all and remain at a steady blood glucose level always.
When I am low, my go to is apple juice. I always keep it in the house and car. I have non chocolate "medicine candy" (tell my grandbabies that, so they don't think they can eat it!) in my purse.
However...I find times when it is "time to eat" and I just am not hungry: I drank a lot of water, had some milk or a soda and my tummy is full. I just eat less.
Went to a retirement buffet today and ate mildly, but a more than a usual lunch. Had a short abbreviated dinner of soup, low carb, healthy as I made it...