Swelling on the top of the foot can be caused by a variety of reasons, which need to be identified one by one and cannot be generalized. There are many causes of swelling on the top of the foot, and a variety of traumas can lead to bruising, swelling and localized pain on the top of the foot. It is necessary to exclude fractures in combination with imaging examinations, and pay attention to rest, and reasonably take hot compresses or use topical medications to soothe the meridians and activate the channels. At the same time, mosquito bites and infections can lead to cellulitis, which can also lead to swelling on the surface of the foot, and patients need to pay attention to timely consultation to the hospital surgery and reasonable treatment under the guidance of doctors. In addition, the occurrence of gout can also lead to swelling of the surface of the foot, when the inflammatory reaction of redness, swelling and heat will appear, colchicine can be taken appropriately to reduce uric acid, and if necessary, the patient can go to the rheumatology and immunology department or surgery of the hospital. Patients are advised to take rest, reduce activities and eat less food containing high purine, such as animal offal, fish and soy products. In conclusion, there are many causes for swollen feet, and patients need to find the corresponding causes in time and take the right treatment to avoid delaying the disease.