Looks like lacquer stress cracks, which is poor IMHO. Doesn't seem structural, but the thing that concerns me is they seem to stem from a pretty critical area - primarily the nut and string angle of the headstock. Sometimes humidity, or lack thereof, can result in a spidering of cracks in areas of high tension, but ultimately, a well made guitar shouldn't have these obvious for at least many years (ie: vintage guitars). It looks as though there's been a shock to the nut or that general area. Or are you using thick gauge strings with standard tunings? Any neck vibrato techniques you're not telling us about?
I'd get a tech to look at it just to get a better 1st hand opinion.
V.