Hi dave,
Suddenly stopping tramadol can cause very uncomfortable withdrawal symptoms. Two of which are insomnia/restlessness and numbness/ tingling in the extremities.
Please call your doctor and tell him/her that you stopped on your own and are now having these problems.
He/she won't yell at you!! Instead, they may actually help you with the withdrawal. Don't put yourself back ON the drug until you talk to the doc.
zuzu