 [ Symptoms ] i have been smoking crack regularly now my limbs go numb chest gets tight and head fills with pressure am i in danger hi i have been using crack cocaine recently and i am starting to have complications when i take a hit no matter how small my left arm immediately stiffens then tingles i a feeling of a lot of pressure in my head a spot in my chest on the last side swells up my throat tightens especially on the left side and its hard to breathe i also feel tight in my lower back i know it is wrong to use i need to know whether these symptoms are life threatening or not [ Disease ] yes these sound like the signs of cardiac arrest setting in try to find help immediately if you can not quit using if you ever hear a ringing in your ears that is also a big alarm of a possible over dose setting in