Yes, Hunger can cause contractions. Even though contractions are a telltale sign of labor, many women are fooled by practice contractions -- known as Braxton Hicks -- in the last few weeks of pregnancy. This may be because practice contractions can be triggered by hunger or dehydration. So eating or drinking something can sometimes quell them.
True labor pains, by contrast, do not lessen until delivery. In fact, they typically get more intense and more frequent over time. For instance, what starts out as an overall crampy feeling may progress into distinct contractions that go from ten to eight to five to three minutes apart.