Fluid retention, bloating, and water retention are three terms for the same condition – excess fluids accumulating in your body’s cavities. Women with PCOS often report this troubling symptom. Imbalanced hormones, especially estrogen, might be affecting your body’s normalizing mechanisms, or it could be a side effect of birth control pills, which is one of the more common PCOS drugs. If you’re struggling with fluid retention and PCOS, you should know you’re not alone. A healthy lifestyle, including a low carbohydrate diet, regular physical activity, and nutritional supplements, can help restore your body’s natural balance and begin to alleviate your symptoms like PCOS weight gain and water retention.