If you aren't checking yourself then you may have a problem. For example you could have testicular cancer and you wouldn't know without feeling an unusual bump in that area.
Answer:
During adulthood, about 8% of fat cells die every year only to be replaced by new ones. As a result, adults have a constant number of fat cells, even those who lose masses of weight. Instead, it's changes in the volume of fat cells that causes body weight to rise and fall.
Explanation:
I hope it helps you...
