I suck at guitar now does this happen to anyone else?

I was doing fairly well playing guitar and then I set my guitar down for about 2 hours and then I come back and I completely suck. I usually come back around to normal in a a few hours to a day or so. What could cause this and if anyone knows does it happen to them too? I've been playing for about 3 years and I play for around 1 1/2 hours a day. Thanks in advance for any insight on this. I'm just wondering why it happens.

probably hand fatigue, you took a break before you got any cramping, but you would've

don't clench the neck as tightly, stay loose and try to let your hand 'float' and don't fret hard unless there is a musical reason to do so...

make sure you play a guitar with the most comfortable neck for YOU. I find fairly thick necks to be less tiring to play, though I am naturally faster on slim necks it does not last due to fatigue... my SG and lawsuit 335 are my least fatiguing necks, my other guitars can be tiring either because the encks are too slim or too thick, or maybe the string spacing makes me arch my fingers differently.... theya re all good to play for an hour or two, but those 2 electrics I can play without tiring for HOURS on end... if all of your guitars fatigue you a little then try switching guitars after you take a break. If you were playing a slim neck switch to a fat neck and vice versa...

additionally there are stretches you can do before and after you play to limber up a little... muscle get tired and a lot of playing is muscle memory.... when your brain is tired how is your memory?

or its not fatigue and then I don't know what to tell you....

Thank you for your help. The neck I play is very comfortable to me. I have a modern C shape Fender Tele neck. I think it was just hand fatigue.

you may want a fatter or rounder neck. It seems comfortable, but you should not getting fatigued in 2 hours if your neck is right for you. Those modern fender "C" necks are fast, but lack shoulder.

Next time you are at a good sized music store pick up a dozen or so guitars with very different neck profiles and spend a long time there. The bigger necks like V shapes and roundbacks will feel challenging at first but will get easier after about 15 minutes. At least for my long, thin hands the Gibson roundback type of profile is the least fatiguing, though the more baseball-bat shaped gibsons and fender U shapes are a bit too much for me. Also try a Clapton strat or a jimmy vaughn. The soft V neck is ideal for a lot of people and is my 2nd favorite neck shape.

nut width and string spacing is also a factor in hand fatigue, and this is not 100% standardized and never really has been so YMMV