Overview of foot deformities

If you want to improve your long-term fitness, you need to walk about 10,000 steps a day and be active for 150 minutes a week.1 Numerous bones, joints, muscles, ligaments and tendons ensure proper functioning as long as your feet are healthy. Cases of incorrect foot positioning nevertheless often occur. Learn more about the most common types of incorrect foot positioning.

Illustration of foot deformities

How can I recognise foot deformities and what types are there?

Have you ever thought about the strain our feet are subject to on a daily basis? Our feet allow us to stand firmly on the ground and move around while keeping our balance. Foot deformities disrupt this interactive process. Although they have very different causes and symptoms, they do have the following in common: left untreated, they can lead to pain and sequelae, for example in the knees, hips, back and neck. Incorrect foot positioning occurs in both children and adults. Incorrect footing positioning is sometimes easy to see, for example when the feet buckle inwards or tilt outwards. 

We give you pointers to recognise a possible incorrect foot positioning. Your doctor alone can then make the concrete and correct diagnosis. They will give you appropriate therapy recommendations to effectively remedy the incorrect foot positioning. 

A brief explanation of foot deformities

Skew foot: the lower leg and the heel normally form a straight line. If the foot arch can no longer hold its original position – i.e. it buckles inwards – this is referred to as skew foot. Causes include unstable tendons and ligaments, muscle weakness or axial malalignment, such as knock knees

Fallen arches: the longitudinal foot arch is flattened. The inside of the foot is thus lower than in a correct foot positioning, and sometimes it even rests completely on the ground. This can cause pain. Rare causes include congenital malformations, which lead to problems as early as in childhood, paralysis, weak ligaments and muscles, and obesity.  

Splayfoot: a transverse arch flattened in the forefoot is referred to as splayfoot. This area carries most of the weight when you walk, leading to pain in the ball of the foot and toe area. Calluses and pressure sores are typical symptoms. How does splayfoot develop? Causes include in particular: unstable tendons and ligaments, muscle weakness, standing for long periods, heavy lifting, obesity. Shoes that are too tight and too high also promote the development of splayfoot. 

Pes transversovalgus: Pes transversovalgus refers to different deformities that occur in conjunction – skew foot, fallen arches and splayed foot. This foot deformity is also commonly known as “flat foot”. If a child’s pes transversovalgus does not regress on its own, it can usually be corrected conservatively with insoles and foot exercises. An insole fitting can also provide adults with support. It provides the necessary soft cushioning, takes the strain off of the forefoot and raises the arch of the foot. 

Highly arched foot: The opposite of flatfoot is high arch. In this case, the longitudinal arch of the foot is overly high and the forefoot and heel are subject to excessive loads. Pressure marks, calluses and so-called claw toes (an abnormal hyperextension in the metatarsophalangeal joint and increased flexion in the metatarsophalangeal and distal joints) can occur as symptoms. High arch can be either congenital or acquired; possible causes can be muscle balance disorders (weaknesses or paralysis). 

Pigeon toe: Usually occurs on both sides and is common in babies. In this case, the forefoot deviates inwards, resulting in a foot with a curved shape. Pigeon toe can be either congenital (positional due to the narrowness of the uterus) or acquired (when the infant is in a preferred prone position). Pigeon toe is generally easy to correct.  

Pes equinus: Pes equinus is characterised by an elevated heel due to an abnormal flexion of the foot in the ankle joint. Obvious symptom: as affected persons are unable to set the entire sole of their foot down, they walk on their “tiptoe”, so to speak. This incorrect foot positioning can be either congenital or acquired. Possible causes include severely shortened calf muscles, muscle diseases, bony changes in the ankle joint or scars.  

Prevention: Preventing foot deformities

Preventing incorrect foot positioning as early as in childhood is better than any correction. Walking barefoot is the best preventative measure. Good shoes likewise significantly promote the development of healthy feet. For example, wearing shoes that are too small may result in foot deformities with lifelong consequences. A lightweight shoe with a flexible sole for dynamic rolling over is ideal. It is also important to have enough space between the shoe and the toes.

Foot exercises: exercises for splayfoot, flat foot, high arch, pes equinus and pigeon toe

Special exercises are very suitable for strengthening the muscles and promoting the mobility of the feet. Please consult your doctor.  

Toe caterpillar

Agility, activating the transverse arch – toe caterpillar  

Lay half a tennis ball on the floor. Claw your toes in the floor and drag your foot in the direction of the ball. When your foot is by the ball, shoot it a little forward with your toes. Repeat many times and then use the other foot. 

Tearing up newspaper

Picking up marbles

Foot massage

Stretching your calves

Insoles for foot deformities

If it is necessary to treat incorrect foot positioning in children and adults orthopaedically, insoles can be a good choice. A flexible carbon chassis in combination with freely placeable support elements – so-called “postings” – enables a specially tailored fitting for splayfoot, skew foot, fallen arch, high arch and pigeon toe: the carbon brace (also referred to as “carbon chassis”) is particularly light, flexible and adapted to natural movement patterns. Although the foot is guided its movement is not restricted. The postings can be precisely positioned. They stabilise the foot statics while giving the foot ample freedom of movement. 

You can find a selection of our premium carbon insoles here. 

Especially for pes planovalgus (combination of skew foot and fallen arches), treatment with the supportive bow insole, which imitates the natural windlass or winch mechanism can be sensible. This ensures that the longitudinal arch straightens up once the toes bend or are lifted. This stabilises the foot during the execution of the step.3 This mechanism is disrupted in pes valgus. bow® straightens the midfoot and rear foot, thus stabilising the arch of the foot. This insole also promotes the natural direction of movement throughout the entire load phase. 

Find out more information about our orthopaedic insoles for the rehabilitation of incorrect foot positioning here. 

Ask for advice at your medical supply store. The orthopaedic shoe technician custom-fits the insole. 



Jeder Schritt zählt. Ärzteblatt.de. (Last access: 23.07.2021).   

Einlagenversorgung. Ein Informationsbuch der eurocom e. V. Internetversion. S. 19 ff. (Last access: 16.7.2021).  

3 Schwering L. Die Plantaraponeurose und der Seilwindenmechanismus des Fußes. Orthopädieschuhtechnik 2016;16(2):20–23. 

Health personnel will make the diagnosis and can prescribe medical aids, e.g. from medi if necessary.
Your medical retailer will fit them individually for you.