Nov. 9—Q: I have a Cavalier King Charles Spaniel who is 9. Recently, over the last two weeks, he developed an involuntary, what I would call, muscle spasm. I can see it in his upper body and through ...
A muscle spasm — also known as a charley horse, muscle cramp or twitch — is a sudden, involuntary movement in one or more muscles. Common causes include stress, exercise, or dehydration, but nerve ...