What Are the Causes of Kyphosis? Here’s an Orthopedic Specialist’s Explanation

Kyphosis is a medical condition characterized by an excessive curvature of the upper back, often making a person’s posture appear noticeably hunched. This condition is also commonly known as hunchback.

Although the spine naturally has curves, a curvature that exceeds the normal limit (usually more than 50 degrees) is considered abnormal.

Understanding the causes of kyphosis is an important first step in preventing and managing this condition. Below is a summary of explanations from orthopedic specialists regarding the various factors that can cause the spine to become abnormally curved.

What Causes Kyphosis?

Kyphosis can occur due to many factors, ranging from daily habits to more serious medical conditions. The main causes include:

Poor Long-Term Posture

This is one of the most common causes of kyphosis, especially postural kyphosis.

It usually develops from habits such as slouching while sitting, standing with drooping shoulders, or frequently carrying heavy loads on the back over a long period of time.

Poor posture causes the ligaments and muscles in the back to stretch, leading to excessive curvature of the spine.

Congenital Abnormalities or Spinal Growth Disorders

Some cases of kyphosis are present from birth (congenital kyphosis) due to problems in spinal formation while the baby is still in the womb.

In addition, conditions such as Scheuermann’s Kyphosis, which usually appears during adolescence, occur when the upper spine grows abnormally and the vertebrae become wedge-shaped rather than rectangular.

Spinal Injuries or Fractures

Severe spinal injuries, such as compression fractures caused by falls or accidents, can damage the structure of the spine and cause the vertebrae to collapse or change shape.

These changes can directly lead to excessive spinal curvature.

Degenerative Diseases (such as Osteoporosis)

As people age, the risk of osteoporosis increases.

Weak and brittle bones are more prone to small fractures or compression in the spine. This condition is a common cause of kyphosis in older adults.

Infections or Tumors of the Spine

Serious spinal infections, such as spinal tuberculosis, or tumors (cancer) that grow in or spread to the spine can significantly damage bone structure.

This damage can alter the shape of the spine and result in abnormal curvature, also known as spinal deformity.

Aging and Decreased Muscle Strength

The natural aging process causes the spinal discs (cushions between vertebrae) to degenerate, shrink, and lose elasticity.

Combined with reduced strength of the muscles that support the back, this can contribute to postural changes that lead to kyphosis.

Risk Factors for Developing Kyphosis

In addition to direct causes, several factors can increase the risk of developing abnormal spinal curvature, including:

Advanced Age

As mentioned earlier, individuals over the age of 60 have a higher risk due to degenerative changes and osteoporosis.

Vitamin D or Calcium Deficiency

Adequate intake of vitamin D and calcium is essential for maintaining bone density and strength. Deficiency in these nutrients can accelerate bone loss (osteoporosis), which is a major risk factor for kyphosis.

Daily Activities That Strain the Spine

Frequently lifting heavy objects with improper technique or engaging in activities that place repeated and excessive stress on the back can weaken the spinal structure over time.

Habitual Slouching or Poor Sitting Position

Children and adolescents who spend long hours sitting in front of computers or using gadgets while slouching are at high risk of developing postural kyphosis. This habit weakens the back muscles that are supposed to support the spine.

Important Reminder

Kyphosis can vary in severity. If you notice that your posture or that of a family member is becoming significantly hunched, especially if accompanied by pain or difficulty breathing, seek professional medical help immediately.

We strongly recommend consulting an Orthopedic Specialist. The doctor can perform a physical examination, review medical history, and conduct imaging tests such as X-rays to diagnose the cause and severity of the condition.

Appropriate treatment—such as physiotherapy, use of a brace, or even surgery—will be determined based on the type and severity of kyphosis.

Do not delay seeking treatment to ensure your quality of life remains optimal.

You can find further services and information regarding spinal disorder management at National Hospital.