At 33 weeks of pregnancy, if there is a great swelling of the feet, the first thing you should look at is whether it is physiological or pathological edema. If it is physiological edema, no special treatment is needed. Usually pay attention to bed rest and do not stand for a long time to avoid poor blood circulation and aggravate the swollen feet. When resting, you can put your feet up to relieve the symptoms of edema. In terms of diet, you should also pay attention to a low salt and low fat diet, do not eat too salty food, and you should also control the intake of water. Another condition is pathological edema. If there is an increase in blood pressure or blood sugar in the middle and late stages of pregnancy, it will easily affect the filtration function of the kidneys and lead to swollen feet, so you should consult a doctor promptly and follow the medical advice to perform glucose-lowering or pressure-lowering treatment to control edema. Also pay attention to the control of diet, not to eat too sweet food.