It would depend on where on your leg the tingling is. Also, is there any numbness in the same area.
If the tingling and possibly numbness is on the back of your leg, anywhere from your butt, back of the thighs, behind your knee or in the calf, it could be a pinched sciatic nerve.
The sciatic nerve can cause pain, numbness and or tingling on the back of your leg.
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If presenting with swelling, probable DVT (blood clot), get it checked out, now. As in, drive to the ER and get an ultrasound, tonight. I'm an ER physician and I've seen people die from this.
If there's no swelling, go to the doctor tomorrow. You might have an L5-S1 disc herniation.
Go see a doctor immediately.
Calling 911 and requesting an ambulance might be a good idea as well. Unlock your front door and open it, or call 911 from a neighbour's house.
a snake bite ..... near the jaw it would be a serious bite ! after numbness will be dizziness