This normally happens in the facial area. Very often a blood vessel that has burst is easily visible, as the blood vessel is situated under a transparent layer of skin. These blood vessels can either be bright red or dark in appearance. The burst blood vessels can cause pain, if they come in contact with anything.
A couplet is a pair of lines of metre in poetry. Couplets usually comprise two lines that rhyme and have the same metre. A couplet may be formal (closed) or run-on (open). In a formal (or closed) couplet, each of the two lines is end-stopped, implying that there is a grammatical pause at the end of a line of verse.
Heroic couplets totally ruled the poetry scene for a long time, especially in the 17th and 18th centuries, when a dude named Alexander Pope was rocking the neoclassical world with works like Sound and Sense, which just so happens to be written in heroic couplets.