Troubleshooting Tips and Cautions

Transfemoral (Above Knee)

While there are sometimes other causes to the above socket fitting problems, most of the time residual limb shrinkage is the source of the problem. If you experience any of these below problems that you are unable to remedy with socks you should contact your prosthetist.

Common Fitting Problems:

Fitting problems due to limb shrinkage may include:

  • Excessive pressure on the end of your residual limb.
  • Uncomfortable pressure on the upper inside of your leg.
  • Inadequate suction, causing the prosthesis to rotate or move up and down.
  • Burping or air sounds when you put weight on the prosthesis.
  • The socket feels loose overall.

Troubles Applying your Prosthesis: 

It will most likely take you 1-2 weeks to learn how to properly apply your prosthesis. Socket rotation (foot turned in or out) is the most common problem. Improper rotation positioning can cause the prosthesis to be uncomfortable and unstable. If you think you have the prosthesis on incorrectly, remove it and reapply.


Transtibial (Below Knee)

Remember, the most common remedy to most socket-fitting problems is adding or removing socks. Prosthetic socks plays an important role in keeping your residual limb comfortably seated within the prosthesis. If your prosthesis is uncomfortable, four out of five times it is because you are not wearing the proper amount of prosthetic socks. Vary your sock ply until the prosthesis feels better. If this does not fix the problem, contact your Prosthetist.


Pressure on the bottom, front-end of your bone? (Anterior distal end of your limb):

  • Try adding a one or two ply sock
  • Did you change shoes
  • Try one with a lower heel

Pressure on the bottom of your knee cap:

  • Try adding a one or two ply sock
  • Did you change shoes
  • Try one with a higher heel.

Pain on the bottom-back of your calf:

  • Try adding one or two ply socks

Pressure on the sides of the knee:

  • Try removing one or two ply of socks. You may need to have a pad added to the inside of the socket



  • It is very important that you avoid quick fix remedies to your socket-fitting problems. Trimming your liner or putting tissue in the bottom of your socket is not recommended. These home remedies may cause harm to your residual limb.
  • Do not cut, grind or structurally modify your prosthesis in any way. Direct modification to the socket will void warranties unless they are done by a qualified Prosthetist.
  • Never attempt to make alignment changes to your prosthesis by adjusting the allen screws on the ends of the pylon. If done improperly, it can result in not only an unstable walking alignment but possible component failure as well.
  • If you experience any socket fitting problems that cannot be fixed by the suggestions listed above, please contact your prosthetist immediately. Sometimes, simply discussing a problem with your prosthetist can result in a quick resolution.