It's one thing to be neglectful of one's health when things are going fine. But to ignore symptoms and "let nature take its course" when health problems emerge is highly risky. Your immune system can battle back against minor infections well enough, but beyond that, nature taking "its course" often means you get worse, not better. Everyday symptoms like headaches, lethargy, dizziness or chronic coughs can often be indicating the emergence of more serious diseases — including life-threatening heart attacks, strokes and cancers. Here are some ways to stay healthy by visiting your doctor regularly.