There are methods to determine flat feet, such as appearance, footprints and imaging tests, which need to be analyzed specifically. 1. Appearance: People with flat feet have flat arches, or even no arches at all. You can observe the palms of the feet as well as the insteps of the feet to determine whether they have flat feet. 2. Stepping on the footprints: you can step on the footprints with bare feet, if the footprints are complete and the middle place shows the footprints, it means that there is flat feet, if the footprints are incomplete and there are no footprints in the middle, it means that it is not flat feet. 3. Imaging examination: X-ray examination can be carried out to ask professional doctors to determine whether there is flat feet. If you have flat feet, you should pay attention to avoiding labor to prevent injury. If there are uncomfortable symptoms, pay attention to timely medical care, improve the relevant examination, under the guidance of a professional doctor for diagnosis and treatment, do not blindly deal with, so as to avoid delaying the condition.