I use copaxone and my shared solutions nurse says its not uncommon to have to take one area out of rotation. I can't inject into my things either.
If you've played with depth (the nurse over estimated how fat I was) with no improvement, it's possible to set up a new a new schedule with the nurse. Just give them a call.
This is why Copaxone was never on my personal list of potential drugs. At the time, the only option was daily injections which I'd have just resented. But also, reading about how common welts and lipoatrophy are sealed the non-deal. It's a well known, very common side effect. That's not to say it effects everyone or that it will always happen to you. But yes — it's experienced by a lot of people.