why does eye become bloodshot after hip bath or sleepless or grief struck state or when drunk?

After a hot bath and after drinking, the blood vessel in the body dilate or catch larger (for different reasons). Redness during a grief struck state is probably due to crying which disrupts the normal state of the eye. The conventional tear show has several layer that are disrupted by crying. As far as sleeplessness is concerned, I am not so sure, unless eye rubbing is involved which could cause mild power-driven problems.