Depression is a complicated and common mental health condition that affects about 10 to 15 percent of Americans. The following questions and answers can help you recognize and get effective treatment for depression.

Q. What are the symptoms of depression?

A. Everyone feels down once in a while, but if you’ve been feeling profoundly sad or blue most of the day almost every day for two weeks or more, you could be depressed, says the National Institute of Mental Health (NIMH). Other symptoms include feeling worthless, guilty, angry, or irritable. Some people who are depressed no longer enjoy their hobbies or spending time with friends or family. Some lose their appetite, and others eat more than usual. Some people want to sleep all the time, but others wake often during the night.

Q. Do children get depressed?

A. Yes, but in a different than adults do. Children who are depressed show persistent behavior changes that disrupt their normal lifestyle. These changes interfere with relationships with friends, schoolwork, interests, and family life, the NIMH says. If you believe your child may be depressed, seek treatment right away.

Q. Who gets depressed?

A. Anyone at any age can suffer from depression. Women, however, are twice as likely to be depressed as men. People who abuse drugs and alcohol have a higher risk for depression, as do people who have a family history of the condition. People with heart disease, Parkinson’s disease, Alzheimer’s disease, stroke, or diabetes also may have an increased risk. In addition, studies have shown a link between depression and an increased risk for Alzheimer’s disease, but the National Institutes of Health says that researchers still aren’t sure whether the condition actually causes Alzheimer's.

Q. Is depression an illness?

A. Yes, and it can be treated. Talk with your doctor about things you can do to gain control over depression. Some people do well with medications. Others prefer talking with a therapist. For most people, a combination of medication and talk therapy is the most effective and long-lasting treatment.

Q. Where can I get help for depression?

A. Start with your doctor, who can rule out a possible physical cause. If depression is diagnosed, your doctor may prescribe an antidepressant, recommend talk therapy, or refer you to a mental health professional for further evaluation and treatment.