If it is stopped suddenly, withdrawal symptoms may occur, such as restlessness, anxiety, runny nose, watering eyes, yawning, sweating, chills, gooseflesh, aches and pains, nausea, diarrhea, poor appetite, high blood pressure
, or fast heartbeat.
Rarely, it can
cause numbness or tingling, hallucinations, or panic.
I have never heard of skin numbness but I researched it online and it does list it as a rare side effect if you stop the drug abruptly.