High arch (cavus foot) is a condition in which the arch on the bottom of the foot that runs from the toes to the heel is raised more than normal. Because of this high arch, excessive weight falls on the ball and heel of the foot when walking or standing causing pain and instability. Children with neurological disorders or other conditions such as cerebral palsy, spina bifida, poliomyelitis, muscular dystrophy are more likely to develop cavus foot. It may sometimes occur as an inherited abnormality.
There are a number of possible causes for arch pain, but the most common are structural imbalances of the foot, such a pronated foot (rolls inward at the ankles). This is often not enough in isolation to cause the problem, but in combination with other factors arch pain may develop. These other factors are usually associated with overuse – running, walking, hard surfaces and/or OFAD (on feet all day), usually combined with inadequate or non-supportive footwear. The more common specific causes of arch pain can be plantar fasciitis (strain of the plantar fascia – a strong ligament that supports the arch), tarsal tunnel syndrome (a pinched nerve at the ankle that refers pain to the arch), foot strain from a pronated foot or flat foot, there can be osteoarthritis of the joints in the midfoot that can cause arch pain.
Symptoms include pain which is often described as a burning pain radiating into the arch of the foot, heel and sometimes the toes. Pins and needles or numbness may be felt in the sole of the foot. Pain may be worse when running or when standing for long periods of time and often worse at night. The area under the medial malleolus on the inside of the ankle may be tender to touch.
In a person of any age, the doctor will ask about occupational and recreational activities, previous foot trauma or foot surgery and the type of shoes worn. The doctor will examine your shoes to check for signs of excessive wear. Worn shoes often provide valuable clues to gait problems and poor bone alignment. The doctor will ask you to walk barefoot to evaluate the arches of the feet, to check for out-toeing and to look for other signs of poor foot mechanics.
Non Surgical Treatment
Depending on your overall health, symptoms and severity of the the flat foot, the condition may be treated conservatively and/or with surgery. Non-surgical treatments for flat feet are centered at decreasing and/or resolving the symptoms (pain). Simple Treatments Patients Can do themselves include wear proper supportive shoes. Use an arch support. Wear shoes with a wide toe box. Modify your activities. Lose weight. Wear shoes with cushion. Non-surgical treatments a doctor might do include Prescribe an oral anti-inflammatory medication. Anti-inflammatory medication is useful to significantly reduce pain and inflammation. Prescribe physical therapy. A physical therapist may perform ultrasound and other techniques to reduce inflammation. You will also be instructed how to stretch your foot and leg properly. Keeping the joint mobile may preserve function. Strengthening weak foot and leg musculature can help prevent further collapse. Prescribe protective pads. Padding and/or cushioning of when areas of bone become prominent on the bottom of the foot, as an effective method of preventing mechanical irritation with shoes. Pads with cutouts may off-weight specific areas of concern. Prescribe custom foot orthotics. A custom foot orthotic is a doctor prescribed arch support that is made directly from a casting (mold) of your feet, and theoretically should provide superior support compared to shoe insert that you would purchase from a pharmacy. In the case of flat feet, specific modifications can be made to the orthotic device to strategically balance the foot. Prescribe custom ankle-foot orthoses. A custom ankle-foot orthotic (AFO) is a doctor prescribed molded arch and lower leg support that stabilizes both the foot and ankle. This is used when the flat foot is significant and provides more support than the simple foot only insert. Give cortisone injection. A articular cortisone injection is a powerful anti-inflammatory medication that is used to rapidly reduce the pain associated with inflammation. Cortisone shots can be extremely effective in alleviating symptoms of flat feet, but will not correct the structure.
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.
People who run regularly should replace shoes every six months, more frequently if an avid runner. Avoid running or stepping on uneven surfaces. Try to be careful on rocky terrain or hills with loose gravel. Holes, tree stumps and roots are problems if you are trail running. If you have problems with the lower legs, a dirt road is softer than asphalt, which is softer than concrete. Try to pick a good surface if possible. However, if you’re racing, be sure to train on the surface you’ll eventually run on. Be careful running too many hills. Running uphill is a great workout, but make sure you gradually build this up to avoid injuries. Be careful when running downhill too fast, which can often lead to more injuries than running uphills. Prevent recurrent injuries. Athletes who have experienced ankle injuries previously may benefit from using a brace or tape to prevent recurrent ankle injuries.
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.