Flat feet (also called pes planus or fallen arches) is a postural deformity in which the arches of the foot collapse, with the entire sole of the foot coming into complete or near-complete contact with the ground. Flat feet can still be quite flexible. When you stand on your toes and your arches pop back up, you probably suffer from hypermobility the foot. A flat foot is a very common foot type, and it may very well be that you’ll never have issues with your feet, but flat feet are an indicator often seen with feet, knee and hip related complaints.
A Joplin's neuroma, or nerve compression on the inside of the big toe joint, is a condition in which a nerve has become trapped. This causes a burning, tingling or in a more advanced stage a numbness on the inside of the big toe. Joplin’s neuroma is often seen in conjunction with a misalignment of the big toe joint (hallux valgus). The pain is present when you wear shoes and subsides when you take the shoes off.
The word "metatarsalgia" is a combination of the Latin words "metatarsus" (metatarsal) and "algia" (pain). But over the years, this term has falsely become a diagnosis. The reason this arose, mainly had to do with the difficulty it entailed in properly distinguishing the many different symptoms of the disease.