sulfer smell in bath sink

I'm with the drain the water heater.

Do you have an outside shower close to the bathroom sink? You need to flush the water through that line or your smell will get even worse.... very soon!!

Sounds like your water heater wasn't drained and you have some funky stuff in there. I would fill my fresh water tank with a bleach solution and run it through ALL your pipes and fill up the water heater. Leave it in for 24 hours to disinfect and kill any stinky microbes.

Happened to me one year, the wife was very sick during her pregnancy and we abruptly stopped camping early in the season. I neglected to drain the water heater and the water sat all summer long. That fall we had the rotten egg stench. Bleach took care of it.

Does your faucet have white plastic, nylon braided supply lines?

Bruce

When was the last time you drained your water heater?

If your water heater has an anode rod you might want to take a look at it.

Should go away if you flush the drain with lots of hot water.

Otherwise use a waste digester with enzymes from Thetford. I use it in the kitchen and bathroom sinks when we get the rotten egg smell. Once in a while after a few months of storage.