I bought it specifically for my neck pain. I noticed it does ease up on the pain once I put it on. In the description on amazon it says that it may leave a residue on there but I haven't experienced that. I usually put it on right after a shower in hopes it absorbs even better! My mother in law also has been using it, which is why I ordered a second bottle. She has bad knees and has trouble walking. She has a calcium deficiency and takes supplements for it. I read somewhere in an article that she may also have a magnesium deficiency as well. While over at our home, I had her rub it on her knees. She could walk right away with no problems! She has been using it every single day since then. She was able to walk up and and down stairs. She has been able to move it all around with no complaints! She actually started crying saying that she was so happy to have her life back and was thankful I showed her this product.