noun
dull pain; dull ache
Medical and everyday term for a persistent, heavy, non-sharp pain, as opposed to sharp or stabbing pain.
腰に鈍痛を感じる。
I feel a dull pain in my lower back.
鈍痛が続くようなら病院に行ったほうがいい。
If the dull ache persists, you should go to the hospital.