Why Do My Feet Swell When I'm on My Period?

Foot swelling around the time of your menstrual cycle can be a symptom of premenstrual syndrome, or PMS 3. In addition to swollen feet, some women experience swelling in the hands or abdomen. Although foot swelling is a common occurrence, it is a symptom that must be monitored.

Water Retention

Water retention happens when the body literally retains too much water 2. When this takes place, the water will gather in certain areas of the body, causing bloating in the hands, feet and abdomen. Water retention is sometimes called bloating or edema 2. It has several causes, including medical conditions and medication side effects. It usually lasts for a few days to a week.


Water retention occurs a week or so before your period begins 2. Women prone to PMS often experience it along with other symptoms such as cramping, fatigue, headaches and mood swings. According to the Mayo Clinic, the causes of PMS and its associated symptoms are unknown, although researchers are sure that hormonal changes trigger them.


Water retention affects each woman in a different way 2. To some, it’s just a symptom that causes no discomfort, while for others it can be bad enough to stop them from doing everyday activities.


There is no medication that stops the swelling of feet due to PMS water retention 2. However, there are ways to minimize the discomfort and the extent of the swelling. One is a good exercise routine. According to the Mayo Clinic, women who participate in daily exercise report fewer PMS symptoms. You should also skip the salt. Salt contains a substance called sodium, which causes swelling. Also, you should limit the intake of foods that contain sodium, such as soy sauce, canned vegetables and processed meats.

Special Considerations

If your symptoms are lasting longer than a week or if your swollen feet are accompanied by cramping or pain, see your physician immediately. The physician may recommend an oral contraceptive prescription to reduce PMS symptoms. Oral contraceptives contain a low dose of the hormone estrogen. This low dose works to control the menstrual cycle in order to prevent pregnancy as well as regulate hormones. Hormonal imbalances cause premenstrual syndrome, so taking these pills can greatly help to reduce it 3.