Oh, if symptoms are gone then it s going to be hard to recommend testing/treatment but easy to say don t do meth. Cannot say in your particular case and the main issues would be direct damage/irritation/poking with the needle (hit a nerve...how fast recovery occurs varies from minutes to months but recovery mostly occurs especially if the symptoms do NOT include weakness/paralysis and if the symptoms improve in under a day) OR loss of blood flow. Meth is a stress hormone that causes blood vessels to squeeze shut. Mostly this would be very visible. This can cause permanent death of the area not getting blood flow. IT is entirely preventable if someone got to the ER in time (minutes to an hour) and permanent by the next day certainly. OR the blood flow effect only is partial, lasts only as long as the drug is there, and goes away completely by the time the drug wears off (certainly by the next day). Bottom line, these questions usually have a lag of over a day. By the time this is received the person receiving it has usually recovered or has permanent damage. In this context, certainly we cannot diagnose, prescribe or recommend action since it isn t in time, but it can answer the question..