I did a lot of research on the internet and found out there are two numbing creams LMX 4%
Lidocaine, (available behind the counter) and EMLA 2.5%
Lidocaine, 2.5% Prilocaine which requires a prescription. I bought both, and actually tested them on myself at home, by sticking insulin needles in myself after 2 hours of leaving the numbing cream on, and it works!