隔靴掻痒[kakkasouyou] being frustrated because something is not quite as hoped (just as one cannot scratch an itch from outside a shoe)
歯痒い[hagayui] impatient
瘙痒[souyou] itch
痛痒[tsuuyou] pain and itching
痒い[kayui] itchy

痛し痒し[itashikayushi] delicate or ticklish situation
痒み[kayumi] itch
麻姑掻痒[makosouyou] things happening exactly as one pleases (wishes)
痒がる[kayugaru] to complain of itching
むず痒い[muzugayui] itchy

ちくちく痛む[chikuchikuitamu] to prickle
哀痛[aitsuu] sorrowing with the bereaved
圧痛点[attsuuten] pressure point
胃痛[itsuu] stomach-ache
筋肉痛[kinnikutsuu] muscular pain

苦痛[kutsuu] pain
腰痛[youtsuu] lower back (or hip) pain
手痛い[teitai] severe
陣痛[jintsuu] labour (birth) pains
精神的苦痛[seishintekikutsuu] mental anguish