1. Pain
It is usually located on the inside of the sole of the foot (pain on the inside of the rear foot), and is aggravated after standing or walking for a long time, and can often become progressively worse. Occasionally, the pain may also be located on the outside of the ankle, near the lateral malleolus. This is the result of the arch of the foot collapsing, causing the hindfoot to evert, and then the fibula and calcaneus impinge.
2. Swelling
Painful swelling outside the joint, especially at the navicular tubercle.
3. Abnormal gait
Pain in the affected foot and collapse of the arch can lead to reduced running or even walking ability and abnormal gait, such as a splayed gait.
4. Pain and abnormal gait
Can affect other joints of the body, such as excessive valgus and internal rotation of the affected foot, resulting in compensatory external rotation of the knee joint. Turning and compensatory external rotation of the hip joint may cause pain and arthritis in the knees, hips, lower back and other parts. Some patients with flat feet may have lower back pain as their only symptom.
5. Severe flat foot deformity
It can be seen that other joints of the foot and ankle are affected, such as the flexibility of the subtalar joint and the transverse tarsal joint is reduced or even stiff.
6. Flat feet
Can be accompanied by plantar fasciitis, sinus tarsi syndrome, etc.