ANDY'S ANSWER: PMS stands for Pre Menstrual Syndrome. Really, it's a variety of things that you may notice in the week or weeks ahead of your period. These can be physical or emotional changes brought on by the hormones in your body.

For instance, physical symptoms may include tenderness in the breasts, bloating or gas, cramping, headache, constipation or diarrhea, increased sensitivity to light or noise, or increased appetite or food cravings.