Tendonitis is a painful condition which restricts the movement of the affected part of the body. As tendons are present throughout the body, this condition can affect different parts of the body like heels, hands, ankles, elbows, shoulder, feet, etc. Achilles tendonitis is a very common type of tendonitis. Acute tendonitis occurs suddenly due to some temporary reason and can be cured within a few days with the help of proper medications and exercises.