Swollen and Aching Legs After Botox on Feet

I have not heard of this problem but I am not saying that it does not exist. I could postulate several reasons for why this could be occuring but they would largely be by conjecture.. I would suggest the use of compression stockings if you have noted swelling and definitely discuss this concern with you treating physician who would wnat to be made aware of your symptoms.

As a physician who specializes in both hyperhidrosis and venous diseases, I can tell you for a fact that what you have experienced after Botox injection of the feet is unuasual and coincidental and not related. Botox does not cause knee pain or selling of your lower extremity. If it does not go away, get aDuplex venous scan of the lower extremities and/or seek a physiatrist for your knee pain and/or an orthopedic specialist.

Botox is a local injection that stays local. It does not migrate. Patient often write to us here at RealSelf with similar question. I think most of the time it's a coincidence that the Botox was injected around the same time as other issues are occurring.
If it keeps up see your primary care doctor and make sure it's not something else. Many diseases manifest as lower extremity edema.

Botox used for hyperhidrosis is a local process. In other words, if it is given in the feet, then it works in the feet. It does not usually cause symptoms away from the site of injection. Sometimes, people are given an inappropriate dose of Botox and that can cause symptoms outside the area of injection. A typical dose for treatment of the feet would likely be one vial of Botox (100 units).
It would not be common to have swelling in the knees/legs, along with aches. You should see your doctor and get examined to get a better idea of what could be causing those symptoms. Good luck.