heya, my corn snakewent through a period of not eating for about a month, after starting eating again he didnt deficate for over three weeks, i have given him a warm bath, which has done the trick, even though he has now gone, is there anything i should do or keep an eye on?
thanks for your help.

What substrate are you using? If it's loose (ie repti-bark, aspen, carefresh) then you might want to consider feeding them on a paper towel so the chances of ingestion are smaller...

What are his temperatures on the substrate and how are you measureing them (type of thermometer)? If the temps aren't right they will have a hard time digesting properly.
How old is he and how long have you had him?