Turning 40 is often a good time to become more proactive about your health. Some health conditions can develop gradually without causing noticeable symptoms, so waiting until you feel unwell may not be the best approach to preventive care.

A stroke can happen suddenly, and recognizing the warning signs quickly can make a critical difference. The symptoms may appear without much warning and can affect movement, speech, vision, balance or coordination.

A heart attack can happen unexpectedly, and knowing the warning signs can help a person or family member respond quickly. While many people associate a heart attack with severe chest pain, symptoms can vary.