Start with this: sometimes putting pressure on the healing ulcer for even a few minutes can reverse the healing that happened up to that point.
A few minutes. That changes what this question is really about. It’s not a question of doing too much. It’s a question of whether the foot is protected at all when it is used.
The reason is in the cause. Foot ulcers are partly caused by too much pressure on one part of your foot. Pressure is not an obstacle to healing that arrives from outside. It’s part of what made the wound.
The answer is not simply to stop walking. It’s to take the pressure off the ulcer while you move. Your provider may ask you to wear special shoes, a brace, or a special cast. You may need to use a wheelchair or crutches until the ulcer has healed. These devices will take the pressure off the ulcer area, and this will help speed healing.
Also: do not walk barefoot unless your provider tells you it is OK.
Pain is not a reliable guide here. Diabetic ulcers are often painless, because of decreased sensation in the feet. A foot that does not hurt is not a foot that is being protected.
This advice is for diabetic foot ulcers and does not carry over. With a venous leg ulcer, the advice is to take a walk or exercise every day, because being active helps improve blood flow. Each is correct for its own wound. Which one applies to you depends on what wound you have, and that is established by examination.
