multiple sclerosis
"Diagnosed in '08, been on Copaxone since then. Took me about six months to realize my injection site problems were caused by the auto-injection contraception. I found it not precise enough, needle can go at an odd angle, or too deep and into muscle (those were the worst). Learned to self inject. I go in at a 45 degree angle and inject slowly. Haven't had any injection site problems since. Knick a muscle once in a while, but that's it. It's a different experience for everyone, as you all know. 
Cut out the salt, take cold showers, and avoid the heat. Haven't tried vitamin D supplements, but sounds like a good idea. 
Last MRI showed no significant changes (good thing, I'm told.)"