What is often a complication for a TT amputee with excessive extension of the socket?

Excessive extension of the socket for a transtibial (TT) amputee can lead to pain in the limb for several reasons. When the socket is positioned too far into extension, it can place abnormal forces on the residual limb and associated soft tissues. This misalignment may lead to irritation, increased pressure, or friction in specific areas, resulting in discomfort or pain. Additionally, the improper alignment can also affect the way the prosthesis interacts with the ground and during ambulation, further contributing to inappropriate loading and pain.

The other options involve potential outcomes that might arise from various fitting or alignment issues but are not the primary complication associated with excessive socket extension. Decreased range of motion might be a consequence of improper alignment, yet it isn't specifically linked to excessive extension. Increased knee stability is generally a desired outcome for a TT amputee and doesn’t represent a complication from excessive extension. Similarly, difficulty with toe clearance can occur due to a variety of factors but does not specifically correlate with excessive extension at the socket as its main issue. Therefore, pain on the limb stands out as a direct and common complication for this specific scenario.