What might indicate that an orthosis is too tight?

The presence of numbness, tingling, or excessive redness in the fit area is a clear indication that an orthosis may be too tight. These symptoms suggest that the device is creating undue pressure on the skin and underlying tissues, which can impede circulation and nerve function. When an orthosis fits properly, it should provide support while allowing for normal skin sensation and circulation. Observing signs of redness can indicate that the orthosis is compressing soft tissues or affecting blood flow, thereby signaling a need for adjustment to prevent potential skin breakdown or injury.

The other choices do not indicate that an orthosis is too tight. Improved mobility could suggest that an orthosis is functioning properly, providing the necessary support without restrictions. A snug but comfortable fit aligns with the goal of orthoses, which is to ensure support while allowing for movement. Lastly, a normal skin tone and sensation typically indicate that the orthosis is fitting well, without causing pressure or complications.