Stress can have severe effects on physical health, contributing to a range of issues such as heart disease, hypertension, and weakened immune function. When under stress, the body increases the production of hormones like cortisol and adrenaline, which can lead to chronic health problems if elevated for long periods. Additionally, stress can lead to unhealthy behaviors such as overeating or substance abuse, further exacerbating physical issues. Managing stress through techniques like exercise, mindfulness, and social support is essential to mitigate its adverse health effects.