 [ Symptoms ] the tip of my left hand thumb has been numbish for 2 days can you explain what could be causing it  it randomly happened yesterday i am 19 years old and i was playing video games at the time this never happened to me before though and i am stumped first i thought it was like a heart attack warning and i scared myself but the feeling was only contained to my thumb it feels kind of like how it feels when you burn your skin but i know i did not burn it seriously stumped [ Disease ] if you are allergic to penicillin you are also allergic to amoxicillin they are related you want to make sure that all of your health care providers know you are allergic to penicillin including your pharmacist this is a very important piece of information