Is this  mosquito bite normal what should I put on it ?

It looks like it could be a healthy mosquito bite.  But it would not be normal for me.  Mine are all red and bleeding from scratching them all to H*ll, and I'd have at least 3 or 4 in about the same spot, up to six.

Dip a cotton swab, or a small cloth, directly into undiluted household bleach.

Dab the insect bite with the bleach. Make sure to dab the entire area.

Hold the bleach covered swab or cloth, directly on the bite for about five seconds.

Allow the area to dry. You should notice improvement immediately.

This works 100% Tried it many times. Works best the sooner you do it after the bite.