Why does the knuckle appear white?

Answer 1

If you grip something hard enough and long enough, the knuckle might appear white as it is not getting a normal blood supply.

== == Poor blood circulation.

When i make a fist, not even squeezing hard my knuckles turn white, the doctor said i had poor circulation and to get more Omega 3 in my diet.

Answer 2

The knuckle can appear white due to pressure being applied to the skin, which compresses the blood vessels and reduces blood flow to the area. This lack of blood flow can make the skin appear paler or white. It is a temporary condition and should return to normal once the pressure is relieved.