Best muscle cramp creams or gels?

Does anyone know if there’s a specific gel or cream—whatever works—for muscle spasms?

To be more specific:
The other day I was shaving my beard and I "tensed up" a muscle (or maybe a nerve, honestly who knows) in my chin area just so I could get a better angle under my lip. Now, that whole tip of the chin and the nerves right under the lip feel stiff, cramped, sort of... sunken in? That's the best way I can describe it. And now, it feels like my gums are constantly pressing against the teeth located right under my upper cheekbones and eyes.

How do I fix this? The pain isn't unbearable, but this constant pressure on my gums is driving me crazy. Plus, I think it actually messed with my face slightly. It looks like the pressure caused my cheek to look a little rounded or asymmetrical, you know what I mean?

Is anyone actually paying attention here?

Not much you can do right now. Just grab an ice pack, get comfortable, and take it easy. If that swelling doesn't start backing off—or if it actually starts getting worse—you should probably head over to the nearest ENT and have them take a look.