My sister went to the doctor and after drawing and testing her blood they told her that she has a lack of potassium, which she's gotten medicine for (I believe it's potassium chloride), but I'm wondering about the side effects of low potassium; for almost a week now her feet have been really bothering her. Every ten minutes or so she gets sharp pains in her feet, and as a result of this she hasn't been able to work, she hasn't gotten much sleep because of the pain in her feet, and she can barely walk. Instead she just hobbles around. The doctor she went to is treating her for the potassium deficiency but hasn't given her anything for the pain. He thinks she needs to wait it out, but she's nervous because her feet haven't been getting better in the last few days.
So, is what's happening with her feet a side effect of the low potassium, or are the two unrelated and it's just a coincidence that she's experiencing both at the same time? It's tingling and sharp pains in her feet, nothing else hurts. Do you know if that's normal, and how long it's going to last?