Arthritis
Arthritis causes a reduction in cartilage (which increased the friction) between the joints. When cartilage becomes damaged or worn down, the affected joint usually becomes inflamed and restricts motion, causing pain. Osteoarthritis gradually develops as we age, whereas Rheumatoid Arthritis often has system-wide symptoms and a genetic relationship.
Plantar Fasciitis
Pain in the bottom of the foot caused by inflammation of nearby tissue. Overuse of the muscles, sudden weight gain, & stress on the foot arch may result in inflammation. Symptoms are characterized by pain in the heel (dull or sharp) as well as burning or aching in the foot arch.