Thumb – What the signs and lines on it say

We have already discussed the size and shape of the Thumb and its position in relation to the rest of the palm with details of significations relating to each type of Thumb. 
However, the reading of a Thumb is not complete without a study of the lines and signs on it for they too hold out important messages which we cannot ignore. Now let us discuss the significations of the signs and lines on the three phalanges of the Thumb.

Significations of Signs and lines on the first or the nailed phalanx of the Thumb