I would suggest checking the instruction manual for your
meter, or the company website for your
meter to see if it is approved for alternate site testing. If it is not approved it will not give accurate readings. Most meters that do alternate sight have a function that you need to activate when you do it. If you do not let the meter know it is alternate sight the readings will not be accurate. You should never do alternate site if you feel low.
Hope this helps you. Feel good.