That 'day after a big session' feeling

Anyone else sometimes feel like total sh!t hte day after a bigger tatto sesh?

I've got it today after around 3.5hrs in the chair yesterday. Headachey, a bit cold-sweaty, generally feel shit.

I get that this is a typical immune reponse, but can anything be done about it other than paracetamol etc?

It does typically pass after a good night sleep, however,