Life expectancy in the U.S. is 78.4. Therefore, middle age is 39.2. So Middle Age is approx 40 to about 50-60 where old begins. Results may vary-If you live in the south, teeth, which are an indicator of age start to fall out at 17 or 18 and middle age is 25 or your 4th child, whichever comes first.
Joint swelling may be accompanied by other symptoms, including stiffness, pain, redness, warmth, and apparent loss of range of motion of the joint. Depending upon the exact cause, swollen joints may occur singly, or multiple joints in the body may be involved at one time.
Other Common Causes of Joint Pain. Conditions other than arthritis that can cause joint pain include: 1  bursitis (inflammation of the cushioning pads around joints). 2  lupus. 3  gout. 4  certain infectious diseases (such as mumps, influenza, and hepatitis). 5  chondromalacia of the patella (breakdown of the kneecapâs cartilage). 6  injury.