Used as a suffix in medical or descriptive terms for specific types of pain (e.g., 頭痛, 腹痛), and occasionally as a standalone noun meaning 'pain' or 'ache'.
I had a bad headache, so I took medicine.
The cause of the stomachache is still unknown.
pain; agony; suffering; distress
lower back pain; lumbago
feel keenly; realize acutely
stomach ache; abdominal pain
pain relief; analgesia
exhilarating; thrilling; intensely pleasurable
sharp pain; acute pain; intense pain
gout
severe; bitter; scathing
labor pains; contractions
deep grief; anguish; heartbreak
throbbing pain; tenderness
deep regret; bitter grief
sense of pain; pain sensation
stomachache; stomach pain
painless; pain-free
toothache
keen; acute; heartfelt
neuralgia; nerve pain
worry; mental agony; heartache
dull pain; dull ache
chest pain
tenderness; pressure pain
grave; sorrowful; mournful
grief; mourning; deep sorrow
labor pains; labour pains
colic; intestinal cramping
miserable commute; painful commute
lamentation; bitter weeping
Standard kanji form used as a suffix or standalone noun for pain.
The kanji 痛 is used in Sino-Japanese compounds to express pain. The reading つう is the on'yomi, commonly used in medical terminology.