Don't panic if you get a little leak when opening or closing a water shutoff valve under a sink or toilet or in your basement If weeping around the stem, i'd do as you read You can usually fix it in minutes with the turn of a wrench.
Water Properties and Facts You Should Know
This quick diy fix for a leaky water shutoff valve is something even a novice can handle
Easily learn how to fix a faucet leaking from stem
All you need is a pair of pliers, inexpensive replacement packing string, and screwdriver. Water shut off valves often leak at the handle or the stem after they are turned off.