Can a bruise turn into a blood clot?

Interrelated Careful: Bruise: blood outside vessel. Blood is water with added salts, proteins and cells (~1000:1 red/white). As a liquid, it is also a hydraulic fluid with viscosity, due to rbcs having “sticky” outer membranes; this is responsible for blood viscosity. Blood also has platelets & proteins which act in chain reaction to either form clots (become a solid) or to dissolve & destroy clots; clotting a balance.

Not exactly: A bruise is blood in the tissue near the surface in general so you see it. It is "clotted" but localized and will resolve/ resorb over a week or two. A black eye is an example.