Voltaren Gel

In October I was prescribed Voltaren Gel for my knees. I, for whatever reason, had patella tendonitis around both knee caps. In Dec. I saw my Neuro and told her I was using the gel. She asked if I had tried it on my face or head or neck. NO. She said to go ahead. She said that if it works for me on my knees it may help with migraine, headache, or just regular muscle aches in other places, and to just 'rub some on'. Last night I rubbed it on my shoulders and the bac