 6. Effects of stress. Insomnia. Insomnia is when you cannot sleep. Insomnia is an effect of stress. Worrying about school, work, or family can sometimes cause insomnia. 7. Angry. Anger is the emotion or strong feeling you get when someone does something bad to you. When someone has a lot of stress, they tend to get angry easily. 8. Sleep. Sleep is to rest your mind and body, usually at night, when you are lying in bed with your eyes closed. It can be difficult to sleep when you feel stressed. 9. Cry. To cry is to produce tears from your eyes, usually because you are unhappy or hurt. Yelling at someone or saying mean things might make them cry. 10. Panic. Panic is a sudden, strong feeling of fear or nervousness that makes you unable to think clearly. Don't panic if you make a mistake on your homework. 11. Headache. Headache is a pain in your head. Not getting enough sleep, eating unhealthy food, and too much stress can cause a headache. 12. Stomachache. A stomachache is a pain in or near your stomach. When some people experience stress, they get a stomachache. 13. Depression. Depression is a medical condition that makes you very unhappy and anxious, and often prevents you from living a normal life. Exercise can help prevent depression. 14. Sick. To be sick is to not feel well physically, like to have a cold or the flu, or other physical problems. If you are sick, you should stay home from school or work. Sad. To be sad is to have a feeling of unhappiness. It is common to feel sad when you feel a lot of stress, and there are many problems in your life. The end.