chronic pain
Medical term for persistent or long-lasting pain, often used in clinical or academic settings.
Treatment of chronic pain requires a multidisciplinary approach.
He has been suffering from chronic pain for many years.
急性疼痛 refers to acute pain, which is sudden and short-term, in contrast to the persistent nature of 慢性疼痛.
Compound of 慢性 (chronic) and 疼痛 (pain, ache). 疼痛 is a Sino-Japanese medical term combining 疼 (ache) and 痛 (pain).