Bloating before a period is a common PMS symptom
The week before your period, you may experience breast tenderness and swelling.
Symptoms such as bloating, swollen arms and legs, and bags under the eyes can also appear. Swelling and bloating are common symptoms of premenstrual syndrome (PMS) that are caused by water retention.
Whether other symptoms of PMS are present or not, water retention is common during this time.