Has anything happened recently, any changes in your life that this could be a subconcious reaction to? A lot of people go through stages where their diets change, they may eat more or they may eat less. Its fine, if you just watch out.
In the short term, its not awful. Just try not to make a habit of it, and watch out for any body-mass loss (I'm not going to say weight loss, because you don't lose weight, you lose body mass - much more visible).
However, long term, it may cause fatigue, lack in concentration, it may mess up your metabolism and organ problems, as well as dry and brittle skin and nails, ang other type things. Generally not great.
Could you try to force yourself to eat, even if it is only one more meal - maybe breakfast?
Take care of you, Jo x