I only linked one lotion.... you should start with rubbing it into your spasming muscles. You don't slather this on like moisturizer....just use little dollops...it smooths out quite a bit.

This reduces muscle cramping, reduces pain by blocking NMDA pain receptors and improves circulation to the area applied.

It is really nice and fast acting too. WalMart has it on the shelf, since spring. Some stores don't have it yet, so check their website and put in your Zip code to see if your store has it. If not, ask them to order it for you. Morton Epsom Lotion.

There are muscle inflammations that affect the thighs, and upper arms. Those can be tested for with blood work. Most lupus testing starts with blood work also.

Do you go camping....? walk in the woods, etc? You should get tested for Lyme also. There are Lyme related bacterial infections as well to check out.