It doesn't hurt in the short term but in the last 23 years I have worked night shift in some form for 16 years. The living a day life will catch up to you eventually.

I have severe central sleep apnea so my sleep has never been normal and I find that it actually helps because I don't get any sort of jet lag and I can sleep anytime as long as I have my machine to keep me breathing.

Lots of studies show cancer and diabetes rates are higher in night shift workers but obviously there isn't a specific cause, just knowing that it is a higher likelihood means you should keep an eye out for the signs and try to prevent it by eating right when you can.