Types

Osteoporosis: Understanding Bone Loss

Choose a preferred language

The body has a natural system for maintaining bone. Understanding this system can help you learn how to maintain your bones.


A balanced system supports the body

The body is always losing (resorbing) and making bone. This process is called remodeling. Bone-resorbing cells take bone apart. They do this so the minerals can be used to repair an injury or make new bone. Bone-making cells form new bone using calcium and other minerals. These minerals come from the food you eat. When this bone-making system is in balance, the same amount of bone is built and resorbed.

Diagram of normal bone growth showing three different types of bone cells.


An unbalanced system can't give support

Changes in hormone levels, activity, medicines, or diet can affect the bone-making system. When the system gets out of balance, the amount of bone lost is greater than the amount of bone made. This can cause osteopenia. It is when bone starts to become less dense. Left untreated, bone loss gets worse, leading to osteoporosis. Weak bones can’t support the body. In fact, they can break (fracture) just from the weight of your body. This often happens in bones of the spine (vertebrae). When vertebrae fracture, parts of the spine compress. This causes the back to bend or hump over, and it can also cause back pain.

Bone with osteoporosis showing osteoblasts not making enough bone and osteoclasts resorbing too much.

Online Medical Reviewer: Banerjee, Rahul, MD

Online Medical Reviewer: Fetterman, Anne, RN, BSN

Date Last Reviewed: 03/01/2024

© 2000-2025 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
Related Articles
Read article
Orthopedics
Knee Fracture

After a knee fracture, you'll have to wear a splint, cast, or knee brace. Learn how to care for yourself at home as you heal.

Read article
Orthopedics
Shoulder Sprain

A sprain is a stretching or tearing of the ligaments that hold a joint together. A sprain may take up to 6 weeks to fully heal, depending on how severe it is. Moderate to severe shoulder sprains are treated with a sling or shoulder immobilizer. Minor sprains can be treated without any special support.

Read article
Orthopedics
Hand Bruise

A bruise causes swelling and some bleeding under the skin. Learn how to care for it at home and when to call for help.

Read article
Orthopedics
Joint Effusion

When too much fluid builds up in a joint, it’s called effusion. Injury or inflammation of the joint can cause extra fluid to collect there.

Our orthopedic specialists will get you moving pain-free again.

From orthopedic surgeons to physical therapists, our orthopedic team has been built to provide seamless care and support throughout your whole journey.

Browse our specialists