In the article “Physical effects of depression: weight gain, fatigue, pain, insomnia”, it is stated: “Abnormal functioning of brain messengers (neurotransmitters) such as serotonin can change your pain threshold. This means you become more sensitive to pain, especially back pain. Serotonin also affects sleep and reduces libido: nearly half of people with depression have sexual problems” (Depression Physical Effects: Weight Gain, Fatigue, Pain, Insomnia Web). Most older people believe that the reason for their poor physical health is age, but most of the time, depression can also be the cause. Many people don't realize the seriousness of depression. Usually people neglect