Confused? Topic

U1196540585 08/22/23
Hi, I have been eating a little less than 1000 calories a day and I am 95.2 pounds, but after lunch at 1:00 and a snack at 2:00 I have already went up to 96.8. I then go on to have dinner and a Yasso bar. After I do a workout. Why am I gaining weight by eating little?

Confused?