M40: Kyphosis and lordosis

M40.3: Flatback syndrome

Flatback syndrome is a spinal condition that results in an abnormal loss of natural curvature in the spine, particularly in the lower back, or lumbar, region. This condition can lead to a variety of issues such as pain, difficulty standing straight, and challenges with balance. It often presents with symptoms including leaning forward while standing or walking, early onset back fatigue, and in some cases, difficulty looking up. Flatback syndrome is usually a result of degenerative changes in the spine due to aging, or it can be a complication of spinal surgery. People with this condition may experience a reduced quality of life due to impairment of physical mobility and persistent pain. The progression of the condition can vary from person to person, depending on factors such as age and presence of other underlying health conditions.