Numbness and tingling are unusual prickling sensations that can happen in any part of your body. People generally notice these sensations in hands, feet, arms, and legs. Many things can cause numbness and tingling, including sitting with your legs crossed or falling asleep on your arm.
Meth can stay in the system and be detected in urinalysis drug tests 1-4 days after use. But chronic use can extended this detection period. More here on how meth works and the length of time it stays in your system, with a section for your questions about meth at the end.
In reality there can be no definitive specific answer for how long crystal meth stays in your system. There are several factors that alter how long it takes for the crystal meth to completely leave your system: Another factor to be considered is in regards to drug testing. Crystal meth, as with other drugs stays for different amounts of time in different areas of the system that are normally tested.