It is common for a while after shunt surgery (or any surgery, really) to feel tired and nauseated. General anaesthetics are quite harsh, and take time to get out of your system. He will also be extremely sensitive around the incision site, so try not to touch his head unless you absolutely have to (for example, to change the dressing). He WILL have a headache for a while - after all, he has just had his head opened up - and should have pain relief for this. I was given a box of strong painkillers (codeine) as I left the hospital after my last surgery. It's quite alright to take these medications as prescribed by the doctor.

Hope that helps you a bit!

Nat.