My hands and feet often feel numb. Could it be a blood circulation problem?

Lately, I've been feeling numbness in my fingertips and toes.
It's uncomfortable because sometimes I feel a tingling sensation even when I'm still.
Is it because my blood circulation is poor?
Or I'm confused if it could be a nerve problem
I'm wondering which department I should go to for these symptoms.
I would also like to know if it can be resolved with simple stretching or exercise.
If I have to get tested, I'm also curious about which tests are performed first.