The conversation between human and AI assistant.
What causes a pulsating feeling under the left rib cage?
No, just the pulsating feeling. But what exactly is a muscle spasm?
A muscle spasm is an involuntary contraction of a muscle or group of muscles, and it can sometimes cause a visible twitching or pulsating sensation under the skin. They can be caused by dehydration, overuse of muscles, or even stress.