The causes of swollen feet in middle-aged women are categorized into many different conditions, such as those caused by mosquito bites, prolonged standing or medication. It may also be caused by cardiogenic diseases and kidney diseases. 1. If the swelling is localized in the ankle, it may be trauma, such as mosquito bites, inflammation, gouty nodules or varicose veins of the lower extremities, venous thrombosis of the lower extremities, and impaired blood return to the lower extremities may lead to swelling of the legs, resulting in localized swelling. 2. Swelling of the feet due to long-term standing, standing for a long time leads to slow blood circulation, it is easy to cause swelling of the feet. 3. Medications also play a large part, such as licorice drugs and calcium channel blockers, which can also cause swelling of the feet. 4. Edema caused by cardiogenic diseases is also called cardiogenic edema, which is usually caused by cardiac insufficiency leading to venous stasis in the circulation, resulting in too much accumulation of body fluids in the interstitial spaces of the body tissues, and edema occurs. 5. Edema caused by renal disease is also called renal edema, which is caused by the swelling of tissues due to the accumulation of excessive body fluids in the tissue interstitial space of the body in the case of renal disease. It usually manifests as edema of the eyelids or face in the morning, and then develops to the ankles and lower limbs, and in serious cases, it can develop into generalized edema. Some women may also experience premenstrual tension syndrome, which can also cause swelling of the feet. It is not possible to rely on symptoms alone to diagnose a disease. If you are unwell, you should seek medical advice as soon as possible.