Jayson Goo, ATC, MA, CKTI, a National Athletic Board Certified Athletic Trainer, graduated from the University of Hawaii and earned his master's degree in human performance with a specialty in corrective therapy from San Jose State University. Jayson also is an active Certified Kinesio Taping Instructor.
Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.
The foot is an intricate structure of 24 bones that form two crossing arches of the foot. The longitudinal arch runs the length of the foot, and the transverse arch runs the width. The ankle joint is formed by the interaction of the foot and the lower leg, and the toes are on the far side of the foot. The bones of the foot are primarily held together by their fit with each other and connected by a fibrous tissue known as ligaments. The muscles of the foot, along with a tough, sinewy tissue known as the plantar fascia, provide secondary support to the foot. The foot has internal muscles that originate and insert in the foot and external muscles that begin in the lower leg and attach in various places on the bones of the foot. There are also fat pads in the foot to help with weight-bearing and absorbing impact.
The foot is the foundation
of athletic movements of the lower extremity. Pain indicates that there is something wrong with
either the interaction of internal structures of the foot or with the how the
foot is interacting with external influences. How and when the pain occurs and
the locations of the pain are the primary clues to what may be causing the pain.
When there is pain, the body reacts by changing the way it moves or functions in
an effort to reduce the pain. Biomechanical changes or disease may prevent the
normal movement and cause further injury.
What causes foot pain?
Foot pain may be caused by many different conditions or injuries. Acute or repeated trauma, disease, or a combination are the most common causes of foot pain. Trauma is a result of forces outside of the body either directly impacting the body or forcing the body into a position where a single or combination of forces result in damage to the structures of the body. Poor biomechanical alignment may lead to foot pain. Wearing shoes that are too tight or high heels can cause pain around the balls of the feet and the bones in that area. Shoes that are tied too tightly may cause pain and bruising on the top of the foot.
Injuries such as ligament sprains, muscle
strains, bruises, and fractures typically occur suddenly (acutely). Sprains,
strains, bruises, and fractures may be the result of a single or combination of
stresses to the foot. A sprain of the foot or ankle occurs when ligaments that hold the bones together are overstretched and their fibers tear. The looseness of ligaments in the joints of the foot may lead to foot pain.
The muscle's bursa and fascia of the foot can be strained by overstretching, overuse, overloading, bruising, or
a cut (such as by stepping on a sharp object). Achilles tendonitis is a common injury of the tendon that attaches at the
back of the heel.
Injury to the bones and joints of the foot can be caused by a
single blow or twist to the foot, or also by repetitive trauma that can result
in a stress fracture. A blunt-force injury such as someone stepping on your foot may result not only in a bruise (contusion) injury but also damage to the muscles and ligaments of the foot. Direct blows to the foot can cause bruising, breaking of the skin, or even fracturing of bones. Metarsalgia is the irritation of the joints of the ball of the foot. "Turf toe"
is a common athletic injury in which the tendon under
the joint at the base of the big toe is strained. Trauma to the toenail can
cause pooling of blood under the nail and the temporary or permanent loss of a
toenail. Repetitive trauma to the bones, muscles, and ligaments can result in
extra bone growth known as spurs or exostosis.
Injuries to both the skin
covering and the internal structures may also be caused by multiple small
repetitive traumas. Micro-trauma injuries can be caused by running on uneven
surfaces, surfaces that are too hard or too soft, or shoes that have poor force-absorption qualities or fit incorrectly. Repeated overstressing of the same
structure of the foot may cause stress fractures, tendonitis, plantar fasciitis,
and acute and chronic osteoarthritis.
The arches of the feet absorb and return force to and from the body to the outside world when we are standing on our feet. Injury to the plantar fascia is a common cause of
arch pain. The plantar fascia is a tough fibrous sheath that extends the length
of the bottom of the foot and lends support to the arch. When the plantar fascia
is damaged, the resulting inflammatory response may become a source of arch pain.
High and low arches (flat feet) may cause pain because of strain to the feet.
Footwear can be a contributor to foot pain. Poor
fitting shoes in the short term can cause blisters, calluses, bruising and be a
source of athlete's foot. The long-term effects may be bunions, corns,
irritation of nerves and joints, misalignment of the toes, and the source of microtrauma injuries to the foot.
Disease, viruses, fungi, and bacteria may also
be the sources of foot pain. Diabetes, Hansen's disease, and gout are common
diseases that affect the foot. Disorders of the nerves to the feet may cause numbness and burning sensation in the feet known as peripheral neuropathy.
Plantar warts commonly found on the bottom of the foot are caused by a virus and can cause irritation. Athlete's foot, which is caused by a fungus, also can lead to foot irritation. A common cause of foot pain is the ingrown toenail. Ingrown toenails occur when the edges of the nail grow through or into the skin, resulting in irritation and sometimes leading to infection.
Gout is a condition that results from crystals of uric acid depositing in tissues of the body. Gout is a condition that can lead to abnormally elevated levels of uric acid in the
blood, recurring attacks of joint inflammation (arthritis), deposits of
hard lumps of uric acid in and around the joints, and decreased kidney
function and kidney stones.
Athlete's foot (tinea pedis) is a skin infection caused by the ringworm fungus. Symptoms include itching, burning, cracking, peeling, and bleeding feet. Treatment involves keeping the feet dry and clean, wearing shoes that can breathe, and using medicated powders to keep your feet dry.
Common warts are skin growths causes by the human papillomavirus. There are many types of warts, including plantar warts, common hand warts, warts under the nails, mosaic wars, and flat warts. Over-the-counter treatments typically involve the use of salicylic acid products.
Ankle pain is commonly due to a sprain or tendinitis. The severity of ankle sprains ranges from mild (which can resolve within 24 hours) to severe (which can require surgical repair). Tendinitis of the ankle can be caused by trauma or inflammation.
Corns and calluses are sometimes painful areas of thickened skin that appear between the toes and fingers or on the soles of the feet. Abnormal foot anatomy, ill-fitting footwear, and unusual gait can put increased pressure in specific areas, causing corns and calluses. Treatment may involve using over-the-counter salicylic-acid products, visiting a podiatrist to be fitted with an orthotic device, or surgical removal.
The common bunion, an enlargement of the inner portion of the joint at the base of the big toe, primarily affects women. The signs and symptoms of bunions include inflammation, redness, tenderness, and pain of the first metatarsophalangeal joint. The little toe may also develop a bunion (tailor's bunion). Rest, walking shoes, stretching, cold packs, and antiinflammatory medications may alleviate pain. Surgery is also a treatment option.
A broken toe is one of the most common fractures among individuals. There are many causes of a broken toe, whether it is the big toe, middle toes, or little toe (pinky). Common symptoms of a broken toe include pain, swelling, stiffness, and bruising. A broken toe can be treated with buddy taping the toe. There are instances where a physician should be consulted for a broken toe.
Shin splints result from inflammation from injury to the tendon and adjacent tissues in the front of the outer leg. Shin splints commonly occur in runners or aggressive walkers, causing pain and discomfort. An increase in workout intensity, weak ankles and pronation may be to blame for shin splints. Stretching, strengthening, and icing the affected area are effective treatments for shin splints. Rest and anti-inflammatory medications are also advised.
Leprosy (Hansen's disease) is a disfiguring disease caused by infection with Mycobacterium leprae bacteria. The disease is spread from person to person through nasal secretions or droplets. Symptoms and signs of leprosy include numbness, loss of temperature sensation, painless ulcers, eye damage, loss of digits, and facial disfigurement. Leprosy is treated with antibiotics and the dosage and length of time of administration depends upon which form of leprosy the patient has.
Fractures occur when bone cannot withstand the outside forces applied to the bone. Fractures can be open or closed. Types of fractures include: greenstick, spiral, comminuted, transverse, compound, or vertebral compression. Common fractures include: stress fracture, compression fracture, rib fracture, and skull fracture. Treatment depends upon the type of fracture.
Bone spurs are pointy outgrowths of bone that develop in areas of inflammation or injury. They commonly occur on the heel and spine and may be the result of reactive arthritis, ankylosing spondylitis, or diffuse idiopathic skeletal hyperostosis. Symptoms include pain, numbness, and tenderness. Treatment focuses on decreasing inflammation and avoiding re-injury.
A bruise, or contusion, is caused when blood vessels are damaged or broken as the result of a blow to the skin. The raised area of a bump or bruise results from blood leaking from these injured blood vessels into the tissues as well as from the body's response to the injury. Treatments include applying an ice pack and pressure to the area by hand.
An injury to a ligament is called a sprain, and an injury to muscle or tendon is called a strain. Sprains and strains may be caused by repetitive movements or a single stressful incident. Symptoms include pain and swelling. Though treatment depends upon the extent and location of the injury, rest, ice, compression, and elevation are key elements of treatment.
There are several bones in the foot, and these bones can be broken (fractured) in a variety of ways. Falling from heights, dropping heavy objects on the foot, or stress fractures from running or walking. Treatment of a broken foot depends on what bone in the foot is broken.
Ingrown toenails are caused by the growth of the toenail into the surrounding nail fold. Symptoms include toe pain, swelling, redness, and yellow drainage. Treatment at home involves soaking the affected foot in diluted white vinegar or Epsom salts, elevating the foot, and trimming the nails straight across. Surgery is also an option for severe cases. Prevent ingrown toenails by wearing shoes with a wider toe box and avoiding repeated injury to the toenails. Avoid curving or cutting the nails short at the edges.
A Morton's neuroma is an inflamed nerve between the bones at the ball of the foot. Symptoms include a burning, sharp pain on the bottom of the foot. Treatment involves resting the foot, wearing better-fitting shoes, ice packs, and cortisone injection.
Diabetes-related foot problems can affect your health with two problems: diabetic neuropathy, where diabetes affects the nerves, and peripheral vascular disease, where diabetes affects the flow of blood. Common foot problems for people with diabetes include athlete's foot, fungal infection of nails, calluses, corns, blisters, bunions, dry skin, foot ulcers, hammertoes, ingrown toenails, and plantar warts.
Regular physical activity can reduce the risk of disease. Regular exercise can also reduce the symptoms of stress and anxiety. There are fitness programs that fit any age or lifestyle.
Nonsteroidal antiinflammatory drugs (NSAIDs) are prescribed medications for the treatment of inflammatory conditions. Examples of NSAIDs include aspirin, ibuprofen, naproxen, and more. One common side effect of NSAIDs is peptic ulcer (ulcers of the esophagus, stomach, or duodenum). Side effects, drug interactions, warnings and precautions, and patient safety information should be reviewed prior to taking NSAIDs.
Turf toe is a sprain to the ligaments around the big toe joint. Symptoms and signs include pain, swelling, a popping sound, and limited range of motion. Treatment may involve taking ibuprofen, immobilizing with tape, cast, or a walking boot.
Gout is a disease that results from an overload of uric acid in the body. This overload of uric acid leads to the formation of tiny crystals of urate that
deposit in tissues of the body, especially the joints. When crystals form in the joints, it causes recurring attacks of joint
inflammation (arthritis). Gout is considered a chronic and progressive disease. Chronic gout can also lead to deposits of hard lumps of uric acid in the tissues, particularly in and around the joints and may cause joint destruction, decreased kidney function, and kidney stones (nephrolithiasis).
Gout has the unique distinction of being
one of the most frequently recorded medical illnesses throughout history. It is
often related to an inherited abnormality in the body's ability to process uric
acid. Uric acid is a breakdown product of purines that are part of many foods we
eat. An abnormality in handling uric acid can cause attacks of p...
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