The diagnosis of flatfoot primarily begins with a doctor's examination. During this examination, the doctor performs various assessments to understand the causes and severity of the condition:

Physical Examination:
* The patient's medical history and potential illnesses or traumas that could lead to flatfoot are examined in detail.
* Signs of abnormal wear on shoes are checked to assess the impact of flatfoot on foot structure.
* The general posture of the feet and legs is observed during simple movements, such as lifting the toes.
* The strength of the Achilles tendon, posterior tibial tendon, and other related muscles and tendons is tested.

An orthopedics and traumatology specialist can make an initial diagnosis by analyzing the patient's feet and gait. When necessary, imaging methods can be utilized to support the diagnosis and further examine the condition in detail.

Imaging Techniques:
* X-ray: Provides detailed images of the foot bones and joints; particularly useful in detecting joint problems such as arthritis.
* Computed Tomography (CT): Used to evaluate bone structures in more detail.
* Ultrasound: Preferred for detailed imaging of soft tissues in cases of suspected tendon injury.
* Magnetic Resonance (MR): Offers the most comprehensive and detailed information about both bone and soft tissues.