Re: Hair loss & blood pressure.

 Would there be a way to prove to the doctor that my mom has high levels of uric acid in the breast area, save for extracting blood from the area? I asked her for a prescription to lower uric acid levels, but she says that she cannot prescribe one without justifying it with a test, etc.

The only way would be to take a fluid sample from the area.  Just like when testing for gout the only way to tell for sure is a needle aspiration from the joint.

But there are serious side effects to drugs that lower uric acid, which needs to be considered.

Also, perhaps you can comment: my mom's inflammation has been decreasing recently. The red area where it was spreading to her back, armpit, etc. is turning back to pink, no longer spreading, and the pink areas are "growing new skin," as my mom puts it. The pus is mostly gone, but it is coming out of one open area. Less milk is also being excreted. Her left (unaffected) breast returned to a normal size. Her arm and wrist, very puffy for months now, have been getting smaller and she could move her arm more.

All of this sounds great.  To me it sounds like the amount of cancer cells being destroyed is lowering indicating less cancer cells, and thus less uric acid.  The uric acid crystals would have contributed to tissue irritation and possible infection.  So these would also decrease as the uric acid decreasing allowing the tissue to start healing.

But just the other day, her arm and wrist "ballooned up" to the point where, as she put it, she "looked like a cartoon character," puffier than it's ever been. But it went away overnight. Why do you think this is happening?

I don't know what she was doing prior to it ballooning up, but it sounds like she was pinching a nerve and possibly the vascular/lymphatic system.  Was she maybe sleeping prior to this happening and maybe laid on her arm wrong?

When the arm and wrist started getting smaller (I'm assuming it's her enlarged lymph node getting smaller), is it because the immune system has less disease to deal with, so it's working less and affecting the lymph node less?

Yes, that would be part of it as well as the tissues being less irritated and healing progressing.

Do you have any idea about that puffiness that lasted one night?

Being that it was just the one day and went down so fast it really sounds like she was pinching something, most likely a nerve.