It also affects the nervous system leading to internal disorders like high blood pressure, headaches, migraines, loss of appetite, phobias, narcolepsy, and many more. Deep depression is a severe cause of stress which may lead a person to drugs. Stress is when you are worried about getting laid off your job, or worried about having enough money to pay your bills, or worried about your mother when the doctor says she may need an operation. In fact, to most of us, stress is synonymous with worry. If it is something that makes you worry, then it is stress.
Acute stress is a reaction to immediate threat.
This threat may possibly be a situation that is experienced even subconsciously or falsely as dangerous. Short term stress includes traffic, noise pollution, isolation, infection and hunger. On the other hand chronic stress has a greater effect on the human mind.