Final answer:
Stress can be both short-term and long-term, bringing about physical and mental problems. It is not always negative.
Step-by-step explanation:
Stress can be either short-term or long-term and can bring about both physical and mental problems. It is not always negative, as there are instances of positive stress or eustress, which can motivate and energize individuals. Examples of physical problems caused by stress include headaches, muscle tension, and digestive issues, while mental problems may manifest as anxiety, depression, or difficulty concentrating.
Learn more about Stress and its effects on physical and mental health