Your body changes when you get older and eventually everything sags, aches, or both. A new survey found out the ages when the average person's body parts start hurting, aging, or otherwise changing.

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    Here are the results:

  • Headaches and migraines start at 24.
  • Back pain starts at 33.
  • Knee problems start at 37.
  • The first gray hair shows up at 39.
  • Joint pain or arthritis starts at 40.
  • Hot flashes start at 50.

The survey also found people start feeling their body generally deteriorating when they hit 30 and one-third of people say the bad choices they made when they were younger are catching up with them.