Strains consist of a stretch or tear of a ligament (connective tissue joining bones), caused by trauma such as a fall or blow to the body, that knocks a joint out of position. Sprains can range from stretching to complete tears. Most vulnerable joints are ankles, knees, and wrists. Sprain symptoms: tenderness, pain, bruising, inflammation, swelling, inability to move, joint looseness, laxity, or instability.
Sprains can result from a twist, pull, or tear of a muscle or tendon (connective tissue from muscle to bone), caused by overstretching or over contraction. Strains can be mild to severe, which if not treated professionally can cause damage and loss of functionality. Strain symptoms: pain, muscle spasm, loss of strength.