• Osteoporosis is a condition in which the amount of calcium and minerals is depleting in the bones, making them weak over time. Picture the bones like a sponge: Over time, holes in a sponge can grow larger and the sponge grows smaller with use. A similar principle is used for the bones: When calcium is depleted, the bones become smaller and weaker. Many osteoporosis patients don't know they have the condition until painful symptoms occur.
  
  

Back Pain

• People with osteoporosis have weaker or more porous bones. Most often one of the symptoms that alerts people that they may have osteoporosis is a spinal fracture or collapsed veterbrae, which causes intense back pain. In addition to back pain related to fractures, those with osteoporosis may experience back pain when putting weight on a certain area, such as standing for an extended period of time.
  
  

Stooped Posture

• The loss in height of an inch is considered a normal part of aging due to the decrease in size of the vertebrae over time, according to bigbackpain.com. However, hunched-over posture, which is also known as a dowager's hump, is a sign of osteoporosis in women. This loss of height can signal bone loss, which is an effect of osteoporosis.
  
  

Easy Fractures or Broken Bones

• Osteoporosis leaves bones, such as those of the wrist, hips, vertebrae or others in a weakened state. If a person falls and easily shatters or breaks a bone, she may have osteoporosis. The most common fractures of this type are wrist or hip fractures, according to UCSF Children's Hospital.
  
  

Neck Pain

• Upper vertebrae may also weaken due to osteoporosis, which can cause neck pain and neck fractures. If a person has trouble lifting her head or feels weak when moving the head, neck pain may be attributed to osteoporosis, according to MayoClinic.com.