<s>[INST] I have pins and needles over my entire body and felt off colour - had an ECG , Blood tests and heart X-Ray two days ago at Hospital while on holiday, nothing found, but still have pins and needles and feel a bit weaker than usual. I have no blood pressure problems, only medications I use are Prozac 20mg and Somac 20 mg. I am 59 yr old, don t smoke rarely ever drink [/INST] HI, thanks for using Chat Doctor Abnormal sensations are most commonly related to issues with the nervous system, most usually peripheral neuropathy. There are different possible causes such as: (1) vitamin b12 or folate deficiency(2)exposure to toxins(3)liver or kidney disease(4)some autoimmune conditions(5)stroke, multiple sclerosis and other neurological conditions(6)side effect of medication(7)idiopathic-cause not known hope this helps </s>