All 4 wisdom teeth removed today under general anaesthetic. bottom lip, chin & right side of tongue numb. op finished at 9.30am. how long till normal?

Hard to say: Ususally, the numbess doesn to last for more than an hour or two, b ut it depends on the type of anesthesia your surgeon administered. Some will last 12+ hours. Give your surgeon a call in the morning if you are still numb and explain your situation.

It may take awhile. : The lip could be numb from the affects of local anesthetic injected while you were asleep, in which case it may be a day or so before it "wakes up." the are could also be numb because of stretching and pressure on nerves while extracting the teeth. In this case, it may be a longer time before the sensation returns, possibly months.

Some time....: Dr. Luedecke and dr. Davantzis gave you great answers. "normal" referring to numbness gone or back to normal as before you had the teeth removed? Everything is highly dependent upon the extent of your surgery, the amount of bone removed, the specific anesthesia, your tendency to swell, your recuperative powers, the skill of your surgeon, etc. Hopefully you will heal quickly.