There are four main reasons for the swelling of the right foot in women: First, due to strains in the right foot area, such as walking on uneven surfaces and strains in the ligaments of the ankle joint, it will lead to the formation of local inflammatory edema and bruising and swelling, which will lead to significant swelling in the right foot, or with painful symptoms. Second, due to thrombosis of the deep vein, the formation of thrombus will lead to reduced venous return, so it is easy to form swelling in the distal location. Third, due to abnormal lymphatic vessels, such as lymphangitis and obstruction of lymphatic vessels, which can lead to abnormal lymphatic return, may also lead to swelling of the right foot. Fourth, because of the local chronic sterile inflammatory lesions, especially when cold and strain will easily lead to the accumulation and increase of inflammatory metabolites, resulting in the formation of local inflammatory edema, and will affect the peripheral circulation. Therefore, after this situation, it is necessary to go to the hospital for local MRI and ultrasound examination to further clarify the condition.