Yes as can the fingertips, toes and nose.
Maybe you mean pulse oximetry. It is the measurement of oxygen in your blood. It is measured when they put that clip on the tip of your finger.
the thumb's tip is in a awkward position than the other fingertips.
My ear was itching in the night and I used a Q-tip to itch it. I did not put it in the Q-tip in very far but when I got up I looked down in the trash can and saw blood on the Q-tip so I used another one and I had more dried blood and some fresh is this normal and why is my ear bleeding?
The cartilage in the tip of your ear is called the auricular cartilage. It provides structure and support to the earlobe.
no it doesnt
Heart rate sensors. A pulse monitor placed on the finger tip can monitor pulse rate.
get a Q-tip
See a doctor.
ear unclogging liquid from the drugstore or a q-tip with water
An oximeter measures the amount of oxygen in the blood by analyzing blood volume in the skin. The method for measuring oxygenation is the same, regardless of the device or the location where it is used.
A Q-tip is a cotton swab. Q-tips are often used for cleaning the outer ear, applying make up or applying antiseptic lotions like Neosporin on cuts, etc.
My daughter cleaned her husband's ears with a Q-tip and now his ear is bleeding. What could this be?