(HealthDay News) -- Depression isn't a normal part of aging. But it is common in people older than age 65, and symptoms of depression can be different for seniors than for younger people.

The American Academy of Family Physicians lists these common symptoms of depression in seniors:

• Losing interest in activities that were once enjoyed.
• Feelings of sadness, numbness, worthlessness or guilt.
• Suddenly crying for no reason, or crying frequently.
• Feeling tired, slow, restless or irritable.
• A sudden change in appetite, or unexplained change in weight.
• Changes in sleep patterns, including sleeping too much or difficulty sleeping.
• Difficulty remembering or concentrating, and making decisions.
• Having frequent headaches, back pain or digestive problems.
• Thoughts about death or suicide.