How can mental illness affect physical health?

Doctors from Harvard University conducted a joint study with several Boston-area hospitals designed to examine the connections and interactions between the mind and the body, specifically the skin. They dubbed their findings the NICE network, which stands for neuro-immuno cutaneous-endocrine. In plainspeak, it's a network consisting of your nervous system, immune system, the skin, and your endocrine (hormonal) system.

All of these are intimately connected through a dialogue of shared interactive chemicals. Like a giant wireless network, when one phone rings, the others can hear it and respond. The Boston researchers studied how various external forces affect our state of mind, from massage and aromatherapy to depression and isolation.

What they discovered confirmed what we had already known anecdotally for centuries: our state of mind has a definite impact on our health and even our looks. People suffering from depression, for example, look older and less healthy, and not because they've let themselves go and aren't grooming themselves as rigorously as their happier counterparts. But they actually are older than happier comrades who are the same biological age.

The stress of living with depression has accelerated the aging process and damaged their health. The World Health Organization has estimated that by the year 2020, depression will be the second leading disability-causing disease in the world. In many developed countries, such as the United States, depression is already among the top causes in terms of disability and excess mortality.

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