Understanding Osteonecrosis and Its Effects on Bone Health

Written by Medicover Team and Medically Reviewed by Dr NVS Vinay , Orthopedics

Causes
Find a Doctor
Diagnosis
Treatment
FAQs
Book an Appointment

1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Osteonecrosis, also known as avascular necrosis (AVN), is a condition in which bone tissue dies due to a reduced or interrupted blood supply. Without enough blood flow, the bone gradually weakens, collapses, and can eventually damage the nearby joint. Early diagnosis and treatment are essential to relieve pain, preserve joint function, and prevent permanent disability.

What Are the Symptoms of Osteonecrosis?

Symptoms often begin gradually and worsen as the disease progresses. In the early stages, some people may have no symptoms until the bone begins to collapse.

Common Symptoms

Joint pain during activity or weight-bearing
Pain that gradually becomes constant
Joint stiffness
Reduced range of motion
Tenderness around the affected joint

Severe Symptoms

Severe pain even at rest
Difficulty walking or standing
Joint collapse or deformity
Loss of joint function

What are the Common Causes and Risk Factors of Osteonecrosis?

Osteonecrosis develops when the blood supply to a bone is interrupted. This may occur because of injury, medications, or medical conditions that affect circulation.

Causes

Bone fractures or joint dislocations
Long-term corticosteroid therapy
Excessive alcohol consumption
Lupus and other autoimmune diseases
Sickle cell disease
Radiation therapy
Blood clotting disorders
Gaucher disease

Risk Factors

Age between 30 and 50 years
Long-term steroid use
Heavy alcohol use
Smoking
Previous joint injuries
High cholesterol levels
Organ transplantation

When Should You See a Doctor for Osteonecrosis?

Consult a doctor if you have persistent joint pain, stiffness, or difficulty moving a joint, especially if symptoms continue despite rest or gradually worsen over time.

Osteonecrosis is commonly treated by an Orthopedic Doctor. Depending on the underlying cause, your care may also involve a Rheumatologist or other specialists.

Persistent joint pain during movement or weight-bearing
Reduced range of motion
Joint stiffness that interferes with daily activities
Pain that continues even while resting

Seek emergency medical attention if you experience:

Sudden severe joint pain
Inability to bear weight or move the joint
Rapid swelling or visible joint deformity

Find Orthopedics for Osteonecrosis Treatment Near You

How Is Osteonecrosis Diagnosed?

Early diagnosis helps preserve the joint and prevents further bone collapse. Doctors use imaging tests along with a physical examination and medical history.

Diagnostic Tests

Physical examination
X-rays
MRI scan for early detection
CT scan
Bone scan when required
Bone biopsy in selected cases
Blood tests to identify underlying medical conditions

What are the Treatment Options for Osteonecrosis?

Treatment depends on the stage of the disease, the affected joint, and the extent of bone damage. The goal is to reduce pain, preserve the joint, and prevent further bone collapse.