Of course, his anxiety issue may well be caused by other factors, we are yet to deduce that, but, I suspect that he may be a victim of Shift Workers Sleep Disorder, or, SWSD.
Our body clock and our minds are finely tuned to daylight activity and night time sleep. Tossing us unceremoniously into a clock which is reversed can have little but a negative affect upon us.
Also, a United Nations report found people who work night shifts have a higher risk of contracting cancer.
The study, published in The Lancet and endorsed by the World Health Organisation, found that night shifts were carcinogenic because workers were exposed to light at night, disrupting their circadian rhythms.
The study found that nurses who worked at night and flight attendants who continually crossed time zones had a higher risk of breast cancer than women who did not have their circadian rhythms disrupted, and that constant light, dim light at night, or simulated chronic jet lag could substantially increase tumor development.
So, what is it, this SWSD? It is a sleep disorder resulting from a constant or recurring disruption of your normal sleep patterns. Our bodies are usually adjusted to a natural circadian rhythm in which we sleep at night and are awake during the day. Anyone working nontraditional hours or shift such as 4 pm to midnight or midnight to 8 am are very likely to suffer from SWSD.
In the developed world it is estimated that of the millions of people who work some form of shift work, 25 percent suffer from SWSD. It is even worse for those who rotate through various shifts. Many shift workers find it hard to adjust or do not adjust at all.
Symptoms include insomnia, excessive sleepiness, no energy, frequent headaches and having difficulty concentrating. It is suspected that many accidents can find their true cause in shift work related fatigue, If you have any of these symptoms, discuss them with your doctor. Non-treatment could lead to more accidents and sickness as well as irritability, impatience, anxiety and depression. Ask your doctor for information on treatments. It is not wise to take any drug or over the counter medicine to help you sleep without first checking with your physician.
There are some things that you can do to help you sleep better when you do work shift work. Try not to work rotating shifts such as 4 pm to 12 pm then 8 am to 4 pm then 12 am to 8 am. Your body can not even begin to adjust. Work the same night shift regularly is better as your body has time to adjust. You can also prepare yourself to sleep better even if it is during the day. To keep the daylight from activating your internal clock, try wearing wrap-around dark glasses on the way home from work. Develop a ritual for going to bed and stick to a regular schedule seven days a week. Hit sack as soon as you can after getting home from work. Discuss the problem with your family and set up a quiet time so you can sleep in peace. They should try to avoid all unnecessary noise at this time.
I guess it all boils down to "well someone has to do it", and then managing it in the most healthy way possible. Good rest and relaxation in your down time just has to be a bonus, and the deep relaxation afforded by basic sessions of hypnosis can only be helpful to both mind and body.
Having been there myself, more than once, I'd totally endorse it. Anything which affects your mind and body in a natural fashion has to be a good thing!