Overview
Most flat feet are not painful, particularly those flat feet seen in children. In the adult acquired flatfoot, pain occurs because soft tissues (tendons and ligaments) have been torn. The deformity progresses or worsens because once the vital ligaments and posterior tibial tendon are lost, nothing can take their place to hold up the arch of the foot. The painful, progressive adult acquired flatfoot affects women four times as frequently as men. It occurs in middle to older age people with a mean age of 60 years. Most people who develop the condition already have flat feet. A change occurs in one foot where the arch begins to flatten more than before, with pain and swelling developing on the inside of the ankle. Why this event occurs in some people (female more than male) and only in one foot remains poorly understood. Contributing factors increasing the risk of adult acquired flatfoot are diabetes, hypertension, and obesity.
Causes
The normal arch is made up of bones and joints, which are held tightly together, in a precise relationship. When this relationship is subjected to repeated abnormal weight, or the normal weight of a lifetime, the force breaks up this normal relationship, causing bones to shift and joints to buckle. This allows the arch to collapse, and produces pain. The ability of the arch to absorb the shock of each step is reduced, so that continued walking will eventually produce pain in the knee, hip, and lower back. All four of the above categories will eventually cause this to happen. Arch pain can also be a manifestation of heel spur or nerve injury in the heel area. There are also certain types of benign growths that can cause arch pain i.e. Plantar fibromatosis.
Symptoms
The muscle imbalance around the foot and ankle gives rise to a typical pattern of deformity in addition to the high arch (known as cavus). The bone under the big toe (called the first metatarsal) can become very prominent and the toes can curl or clench like a fist (called claw toes). Excessive amount of weight may be placed on the ball and heel of the foot, which can lead to the ankle weakening and giving way (this is referred to as ankle instability) and soreness. Calluses and sometimes stress fractures may occur where the foot is exposed to extra friction or pressure, such as on the outer (or lateral) border of the foot.
Diagnosis
In people with flat feet, the instep of the foot comes in contact with the ground when standing. To diagnose the problem, the health care provider will ask you to stand on your toes. If an arch forms,the flat foot is called flexible. You will not need any more tests or treatment. If the arch does not form with toe-standing (called rigid flat feet), or if there is pain, other tests may be needed, including a CT scan to look at the bones in the foot. MRI scan to look at the tendons in the foot. X-ray of the foot.
Non Surgical Treatment
Consult a doctor to diagnose the condition and determine the cause. If revealed to be plantar fasciitis, please refer to our article on that injury for further information. Generally arch pain is easy to treat, with the most effective method of treatment being the placement of arch supports in the shoes. This counteracts the strain placed on the arches by biomechanical errors, causing them to cease stretching excessively. A specialist can recommend the inserts suitable to your needs, which will depend on the shape of your arches. These supports should lessen your symptoms within days. If pain is severe you should refrain from running activities until it subsides to avoid risking an aggravation of the injury. To maintain fitness, alter your training program temporarily to be focused on low-impact sports like swimming. Applying ice to the affected area should assist in reducing pain and swelling.
Surgical Treatment
Tendon transfers: Too much pull of certain muscles and tendons is often the cause of the deformity related with a cavus foot. Moving one of these muscles or tendons may help the foot work better. In addition, patients with a cavus foot may have weakness in moving the foot up, which is sometimes called a foot drop. In these cases, a tendon from the back of the ankle may be moved to the top of the foot to help improve strength. Correcting the deformity of the foot may not be possible with soft tissue procedures alone. In these instances, one or more bone cuts (osteotomies) may be needed. Instead of a bone cut, a fusion (arthrodesis) procedure may be used. A fusion removes the joint between two bones so they grow together over time. During a fusion the bones may be held in place with plates or screws. Calcaneal osteotomy: This procedure is performed to bring the heel bone back under the leg. This is needed if correction of the deformity in the front of the foot does not also correct the back of the foot or ankle. A calcaneal osteotomy can be performed several ways and is often held in place with one or more screws. Sometimes patients have a deformity that has caused damage to the joints. In these cases, soft tissue procedures or bone cuts may not be enough, and it may be necessary to eliminate the joint. Clawed toes are a common problem with cavus foot deformity. This can be treated with tendon surgery, fusion or removal of part of the toe bones. Following surgery the toes are often temporarily held in place with pins.
Stretching Exercises
Inchworm. Stand with your weight on one foot. Raise the metatarsal heads of the unweighted foot while you pull its heel closer to your toes. Next, raise your toes toward the ceiling, and then relax your whole foot with it flat on the floor. Your foot should move like an inchworm across the floor. Reps 6-7 for each foot. Horsepawing. Stand with your weight on one foot and the other foot slightly in front of you. Raise the metatarsal heads on the front foot. Lift your heel ever so slightly off the ground, maintaining the raised metatarsal heads, and pull your foot toward you so that it ends up behind you. Return this foot to the starting position in front of you. You should really feel this one in your arch. Reps. 6-7 for each foot. Toe pushups. Sit in a chair with your feet resting on the floor. Raise your heel as high as you can while keeping your toes flat on the floor. This is the starting position. Using your toe muscles, roll your foot upward until the weight of your foot is resting on the ends of your toes, like a dancer standing on point in toe shoes. Roll back down to the starting position. Reps. 10-20 for each foot. Sand scraping. Pretend you are at the beach standing in loose sand. Use your big toe to pull sand inward toward your body, with your little toe off the ground. Then use your little toe to push it away, with your big toe off the ground. Reps. 10 for each foot. Now reverse the exercise: pull the sand inward with your little toe and push it away with your big toe. Reps. 10 for each foot.
Most flat feet are not painful, particularly those flat feet seen in children. In the adult acquired flatfoot, pain occurs because soft tissues (tendons and ligaments) have been torn. The deformity progresses or worsens because once the vital ligaments and posterior tibial tendon are lost, nothing can take their place to hold up the arch of the foot. The painful, progressive adult acquired flatfoot affects women four times as frequently as men. It occurs in middle to older age people with a mean age of 60 years. Most people who develop the condition already have flat feet. A change occurs in one foot where the arch begins to flatten more than before, with pain and swelling developing on the inside of the ankle. Why this event occurs in some people (female more than male) and only in one foot remains poorly understood. Contributing factors increasing the risk of adult acquired flatfoot are diabetes, hypertension, and obesity.
Causes
The normal arch is made up of bones and joints, which are held tightly together, in a precise relationship. When this relationship is subjected to repeated abnormal weight, or the normal weight of a lifetime, the force breaks up this normal relationship, causing bones to shift and joints to buckle. This allows the arch to collapse, and produces pain. The ability of the arch to absorb the shock of each step is reduced, so that continued walking will eventually produce pain in the knee, hip, and lower back. All four of the above categories will eventually cause this to happen. Arch pain can also be a manifestation of heel spur or nerve injury in the heel area. There are also certain types of benign growths that can cause arch pain i.e. Plantar fibromatosis.
Symptoms
The muscle imbalance around the foot and ankle gives rise to a typical pattern of deformity in addition to the high arch (known as cavus). The bone under the big toe (called the first metatarsal) can become very prominent and the toes can curl or clench like a fist (called claw toes). Excessive amount of weight may be placed on the ball and heel of the foot, which can lead to the ankle weakening and giving way (this is referred to as ankle instability) and soreness. Calluses and sometimes stress fractures may occur where the foot is exposed to extra friction or pressure, such as on the outer (or lateral) border of the foot.
Diagnosis
In people with flat feet, the instep of the foot comes in contact with the ground when standing. To diagnose the problem, the health care provider will ask you to stand on your toes. If an arch forms,the flat foot is called flexible. You will not need any more tests or treatment. If the arch does not form with toe-standing (called rigid flat feet), or if there is pain, other tests may be needed, including a CT scan to look at the bones in the foot. MRI scan to look at the tendons in the foot. X-ray of the foot.
Non Surgical Treatment
Consult a doctor to diagnose the condition and determine the cause. If revealed to be plantar fasciitis, please refer to our article on that injury for further information. Generally arch pain is easy to treat, with the most effective method of treatment being the placement of arch supports in the shoes. This counteracts the strain placed on the arches by biomechanical errors, causing them to cease stretching excessively. A specialist can recommend the inserts suitable to your needs, which will depend on the shape of your arches. These supports should lessen your symptoms within days. If pain is severe you should refrain from running activities until it subsides to avoid risking an aggravation of the injury. To maintain fitness, alter your training program temporarily to be focused on low-impact sports like swimming. Applying ice to the affected area should assist in reducing pain and swelling.
Surgical Treatment
Tendon transfers: Too much pull of certain muscles and tendons is often the cause of the deformity related with a cavus foot. Moving one of these muscles or tendons may help the foot work better. In addition, patients with a cavus foot may have weakness in moving the foot up, which is sometimes called a foot drop. In these cases, a tendon from the back of the ankle may be moved to the top of the foot to help improve strength. Correcting the deformity of the foot may not be possible with soft tissue procedures alone. In these instances, one or more bone cuts (osteotomies) may be needed. Instead of a bone cut, a fusion (arthrodesis) procedure may be used. A fusion removes the joint between two bones so they grow together over time. During a fusion the bones may be held in place with plates or screws. Calcaneal osteotomy: This procedure is performed to bring the heel bone back under the leg. This is needed if correction of the deformity in the front of the foot does not also correct the back of the foot or ankle. A calcaneal osteotomy can be performed several ways and is often held in place with one or more screws. Sometimes patients have a deformity that has caused damage to the joints. In these cases, soft tissue procedures or bone cuts may not be enough, and it may be necessary to eliminate the joint. Clawed toes are a common problem with cavus foot deformity. This can be treated with tendon surgery, fusion or removal of part of the toe bones. Following surgery the toes are often temporarily held in place with pins.
Stretching Exercises
Inchworm. Stand with your weight on one foot. Raise the metatarsal heads of the unweighted foot while you pull its heel closer to your toes. Next, raise your toes toward the ceiling, and then relax your whole foot with it flat on the floor. Your foot should move like an inchworm across the floor. Reps 6-7 for each foot. Horsepawing. Stand with your weight on one foot and the other foot slightly in front of you. Raise the metatarsal heads on the front foot. Lift your heel ever so slightly off the ground, maintaining the raised metatarsal heads, and pull your foot toward you so that it ends up behind you. Return this foot to the starting position in front of you. You should really feel this one in your arch. Reps. 6-7 for each foot. Toe pushups. Sit in a chair with your feet resting on the floor. Raise your heel as high as you can while keeping your toes flat on the floor. This is the starting position. Using your toe muscles, roll your foot upward until the weight of your foot is resting on the ends of your toes, like a dancer standing on point in toe shoes. Roll back down to the starting position. Reps. 10-20 for each foot. Sand scraping. Pretend you are at the beach standing in loose sand. Use your big toe to pull sand inward toward your body, with your little toe off the ground. Then use your little toe to push it away, with your big toe off the ground. Reps. 10 for each foot. Now reverse the exercise: pull the sand inward with your little toe and push it away with your big toe. Reps. 10 for each foot.