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

© 2000-2026 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.

Find a Provider

View Our Directory

Find a Location

View Our Practices
Related Articles
Read article
Orthopedics
Transverse process fracture

You have fractured a transverse process. You have 2 transverse processes that extend off each vertebra, 1 on each side. This is where the muscles and ligaments of the back attach to the spine.

Read article
Orthopedics
Understanding an Ankle Fracture

When you have an ankle fracture, it means that one or more of the bones in the ankle are broken. Read on to learn about details such as causes, symptoms, and treatment.

Read article
Orthopedics
Tailbone (Coccyx) Fracture

The tailbone, or coccyx, is at the bottom of your spine. It is possible to break (fracture) this bone when you fall and land in a seated position. This injury takes about 4 weeks to heal. Read on for details on caring for this injury at home.

Read article
Orthopedics
Shoulder Fracture

You have a break (fracture) of the shoulder. This may be a small crack in the bone. Or it may be a major break with the broken parts pushed out of position.