It begins in the chest and can move to the back ... Researchers do not fully understand the causes of esophageal spasms. The current theories link the condition to irregular nerve activity ...

Though most hiccups are harmless and fade away quickly, some can be painful or persistent. To figure out why, experts suggest paying attention to other symptoms that might accompany those odd ...

These common causes of muscle spasms are usually minor conditions that easily resolve. But you should talk with your doctor if you suspect a medication is causing your muscle twitching.