According to the internet, there can be several reasons why you feel numbness or a tingling sensation after surgery.
https://www.verywell.com/numbness-and-tingling-after-surgery-3156878
Numbness after any surgical procedure is expected for several weeks to months following. As the nerves to the area are traumatized and will then experience a temporary neuropraxia, a transient loss of nerve conduction. This usually resolves over the next 6-12 weeks, but depending on the procedure performed, sometimes much longer.