Could this be some sort of deep vein thrombosis as I get leg cramp easily and this is effecting my driving.?

I have visited the doctor and did a blood test and everything was tested as normal. I use the gym twice a week and this has improved my circulation but I still get minor pins and needles if I sit more than 30 mins in the driving sit. Can anyone help? Note - I do not have a weight problem.

From what you've said it is unlikely to be due to a deep vein thrombosis (DVT) as this generally causes swelling and redness, with an achy pain in the calf or thigh. Pins and needles usually indicates a neurological problem (something wrong with the nerves) and by far the most common problem caused by sitting down for too long is sciatica. This is due to the nerves from your spine supplying your legs becoming compressed causing pain and pins and needles especially down the back of your leg. Does this sound like the pain your having???

There could be lots of possible explanations.

Could be a pinched nerve in your ... uh ... butt ... that is causing the tingling.

Diabetic neuropathy can cause tingling, especially in the feet and hands.

Go back to a doctor and ask her to run some more tests. She might want to send you to someone who specializes in vascular problems, or perhaps a neurologist, or a diabetes specialist.

If nothing else, when you are driving for extended periods, stop occasionally and stretch and walk around the car, just like they recommend for people on long air flights.

Here's a good exercise:
http://www.thomascookairlines.co.uk/Heel...

There is also some good information at this website:
http://www.dmt123.com/other-health/124-1...

Have you tried adjusting your seat height, the way you sit and the distance from the pedals?

Does it happen sat on a chair or only in your car?

WHY NOT ASK TO GET A TEST SCAN SO YOU HAVE THE X-RAY OF UR LEG THIS IS MUCH BETTER THAN JUST A BLOOD TEST

It's affecting your driving, by having an effect on it.

it is a very common thing. you see when you sit in a certain position you sit on veins and major arteries which slow down the blood flow hence the pins and needles. and also it could be a lack of salt in the body. i would check out your doctor again and tell him it bothers you. it is not serious but i would try and get out of the car and stand up for a mo. a good exercise you can do is when you sit at home pump your feet up and down this will improve circulation a lot. have you checked your car seat that it is not putting pressure on the back of your thighs or calf's if so a cushion will also help....hope this helps you and take care..by the way i dont think you should worry about thrombosis.

Your symptoms suggest more like due to a trapped nerve, could be sciatic nerve near hip joint.

Could also be due to vertebral disc prolapse.but these cause pain rather than pins and needles more commonly

Do some back exercises.(only after seeing physiotherapist or orthopaedician)

Do you smoke? smoking can affect the blood supply, but the pain is brought on by walking in smoking related ischaemia.

I wouldn't worry about thrombosis; I had similar symptoms and it definitely was a lack of calcium/magnesium/potassium.
I can't say which, but the symptoms went away when I took supplements of all three. I also did stretching exercises and ate 3 cloves of garlic every day for a fortnight, so I can't be sure what really helped. One of them did.

DVT rarely has sensorial symptoms in the extremities. DVT, basically a blood clot that has broken loose, goes to the lungs, so you feel short of breath, or very very tired all the time.
Phlebitis can cause localized pain and swelling in the legs, and peripheral vascular disease can also cause symptoms similar to yours. Blood tests are not always indicative of peripheral vascular disease, would see a vascular medicine specialist, there are meds that can encourage the growth of additional circulatory vessels.