What I would suggest you try is to try and stick your pinky through the watch while wearing it and if it isn't going through, loosen until it can.
If the answer to above was yes or has been addressed and the problem still persists, take it off for a week and give it to a friend to try out. Check your results and do one of the following:
a: If your arm continues to tingle, consult a doctor as you may have a blood clot, which can ultimately leave to an infarction. Please note the keyword "may", so please don't panic about it.
b: If your arm stops tingling but the friends arm doesn't tingle either, it could be psychosomatic, or an allergy to aluminum/zirconia/plastic, or stainless steel/ceramc, or to the band you're wearing. Try securing the watch with something else and see if that solves your problem. If it does, get a different band not consisting of material in your current band.
c: If your friends arm started tingling, watch's power source may not be wired properly, resulting in a leak to the watch's housing and then into the skin. However, the current in the battery is too small to cause such a sensation. Regardless, contact Apple.
If none of the above works, try not lifting your arm so much. Consistently lifting your arm shifts blood flow from it, which can cause muscle fatigue and put the arm asleep, causing your tingling sensation.
If the answer to above was yes or has been addressed and the problem still persists, take it off for a week and give it to a friend to try out. Check your results and do one of the following:
a: If your arm continues to tingle, consult a doctor as you may have a blood clot, which can ultimately leave to an infarction. Please note the keyword "may", so please don't panic about it.
b: If your arm stops tingling but the friends arm doesn't tingle either, it could be psychosomatic, or an allergy to aluminum/zirconia/plastic, or stainless steel/ceramc, or to the band you're wearing. Try securing the watch with something else and see if that solves your problem. If it does, get a different band not consisting of material in your current band.
c: If your friends arm started tingling, watch's power source may not be wired properly, resulting in a leak to the watch's housing and then into the skin. However, the current in the battery is too small to cause such a sensation. Regardless, contact Apple.
If none of the above works, try not lifting your arm so much. Consistently lifting your arm shifts blood flow from it, which can cause muscle fatigue and put the arm asleep, causing your tingling sensation.