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Sudden weight gain or weight loss could be a sign of any number of medical issues, but even if depression is not the cause, you should still consult a doctor. If you have noticed that your appetite has increased or decreased significantly, then be sure to talk to your doctor about this as well. This may be a symptom of depression, or it could indicate another underlying problem. You may also consider any risky behaviors that you have adopted as a symptom. This is especially true for men with depression. If you have recently started engaging in drug and/or alcohol use, unsafe sex, reckless driving, or dangerous sports, then this may indicate depression. Frequent crying paired with other symptoms could indicate depression, especially if you aren't sure why you're crying. Consider how often you typically cry and what makes you cry.  For example, if you find yourself crying for no reason or over something trivial, such as spilling a cup of water or missing your bus, then this is a good indication that you may be depressed. Be sure to share this symptom with your doctor. Tearfulness, or frequent crying, is a common symptom of depression in teens. If you have frequent unexplained headaches or other pains, this is another good reason to consult a doctor. A medical condition may be to blame or the aches and pains may be due to depression.  Physical pain is one of the more common and often overlooked signs of depression in men. If you are a man experiencing backaches, headaches, stomach problems, sexual dysfunction, or any other physical symptoms, be sure to tell your doctor.  Elderly people often complain about physical problems over mental or emotional ones, and so depression may hide for a long time. Be aware of any physical changes, deaths of friends, and losses of independence that could trigger depression. You may also notice things like having trouble sleeping, or sleeping too much.
Keep an eye out for appetite changes. Note any risky behaviors. Consider how often or how easily you cry. Reflect on any mysterious aches and pains you have had.