This is Dr. David
I am sorry you are having spasms of your peroneus brevis muscle.
spasms there can be caused by pinched superficial fibular nerve, deep fibular nerve, or the common peroneal nerve which travels around the lateral aspect of the knee.
you really need an MRI scan of your lower leg to look for areas of nerve impingement and swelling.
the severe swelling in your ankles could be part of the problem.
you might have to travel to a larger city university orthopedic department or orthodics department for them to have more experience to make a better orthodic shoe for you.
you have to be careful with botox injections which can paralyze muscles in your leg and keep you from being able to walk at all.
you also need blood test to check for low magnesium and low potassium levels which can cause muscle spasms.
you may benefit from neuropathy medications like neurontin or lyrica which could help decrease nerve pain and problems there.
let me know if you have other questions.
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