Each person's body is a book, recording silent stories. Before we realize a disease is present, the body often silently sends out signals, trying to convey unusual information. These signals may be so subtle as to be imperceptible, but they are crucial indicators of life and health. If we can recognize and interpret these "SOS signals" in time, we may be able to prevent or even save a life. The human body sends us warnings through various signals in daily life. Understanding how to recognize these signals and taking timely measures when abnormalities occur can often prevent the condition from worsening and even save lives. Not all bodily signals are equivalent to serious illnesses, but they reflect that certain systems in the body are triggering protective mechanisms, giving us a reason to pay attention.