If you mean pins and needles, a.k.a. your arm or leg "falling asleep" it is good to rub them or move them around until the blood flow comes back. One trick that works is to draw 'x's with your finger on the numb place. Maybe it just gets your mind off the uncomfortableness, but it works.

If you have numbness after waking, standing, sitting or keeping a limb in the same position for a period of time, it could be simply that you are limiting proper curculation, which is what causes our limbs to "fall asleep".

• Preventative/Sleep: Lay in a different position than you normally do.
• Preventative/Sitting: If you can, try to stand and move around as much as you can. If that is not possible, you might try getting a massaging pad or chair cover (with heat if possible) to try and improve your circulation.
• Preventative/Limb: Keep your limbs in an "at rest" position, rather than bent at angles, or for shorter periods of time.
• Preventative/Repetition: Try not to do overly repetitive actions. If you must (such as using a computer mouse) Look for alternatives such as stylus & tablet set ups that allow for more natural movement.

• Post/Moving: Once something has fallen asleep, moving the limb/digits (as irritating or teeth-clenching as it can be to do so) will return blood flow to the area and end the numbness and tingling sooner.
• Post/Warmth: Immerse the area in warm/hot water, or wrap in a warm/heated towel (or similar). The warmth will open up the blood vessels and allow circulation to return faster.

• If there seems to be no cause for the numbness (such as it simply falling asleep)
• It is accompanied by a rash
• It is accompanied by pain in your neck, forearm, or fingers
• You seem to urinate more often
• Numbness or tingling is in your legs and gets worse when you walk
• You get dizzy, have muscle spasms, or have other unusual symptoms

• Numbness or tingling occur just after a head, neck, or back injury
• You are confused or have lost consciousness (even briefly)
• You cannot control the movement of an arm or a leg
• You have lost bladder/bowel control
• Weakness or paralysis occurs with numbness or tingling
• You have slurred speech, change in vision, difficulty walking, or weakness

Tingling in parts of the body can be a symptom of nerves being restricted this can occur in the hands arms and feet as a result of RA and if not attended to can cause serious damage to both muscles and nerves.