• Bunions. A bunion is a common deformity in which the base of the big toe is enlarged. The skin over the enlarged joint may be red and tender. As the bunion gets larger, you may find it difficult to find comfortable shoes. Walking may be painful. Your big toe may angle toward or move under your second toe. The second toe, in turn, may overlap your third toe, causing pain and deformity of the entire foot. Nine out of 10 bunions occur in women. Bunions are often caused by wearing tight, narrow shoes or high heels.

Read more about bunions from the American Academy of Orthopaedic Surgeons.

  • Plantar fasciitis. Plantar fasciitis is inflammation of a thick ligament called the plantar fascia, which runs along the sole of the foot, from the bottom of the heel bone to the toes. It can feel like the arch of the foot is tearing. People with inflammatory forms of arthritis, such as rheumatoid arthritis, ankylosing spondylitis or reactive arthritis, as well as those with fibromyalgia, are more likely to develop plantar fasciitis. Other causes include being overweight, standing too long, having arches that are either too high or too flat, or wearing unsupportive, hard-soled shoes.

Learn more about plantar fasciitis.

  • Heel spurs. When plantar fasciitis continues for a long time, a calcium deposit called a heel spur may form where the fascia tissue band connects to the heel bone. In some cases heel spurs cause pain when walking.

Read more about heel spurs and plantar fasciitis from the American Academy of Orthopaedic Surgeons.

  • Morton's neuroma. A thickening of the tissue that surrounds the nerve that leads to the toes, Morton's neuroma often causes pain on the ball of the foot or the sensation of walking on a marble. The condition usually develops between the third and fourth toes, often in response to irritation, trauma or excessive pressure. High-heeled or tight, narrow shoes can make the condition worse.

Learn more about Morton's Neuroma from the American Academy of Orthopaedic Surgeons.