Usage patterns
唇を噛むto bite one's lip (in frustration or to hold back emotion)
He bit his lip in frustration.
唇が乾くfor one's lips to become dry/chapped
My lips get dry in winter.
唇を舐めるto lick one's lips
She licked her lips nervously.
唇に口紅を塗るto apply lipstick to one's lips
I put lipstick on before going out.
唇が青くなるfor one's lips to turn blue (from cold)
His lips turned blue from the cold.