Women with PMS tend to have higher levels of blood sugar imbalances, which causes cravings for sweet, sugary foods. Unfortunately, eating sugary foods further exacerbates the cravings and so a vicious cycle begins. Instead, you can help to reduce cravings by changing your diet to one that supports blood sugar balance. A blood sugar balancing diet can also help to reduce other symptoms of PMS such as mood, energy levels and the ability to cope with stress.