noun
Medical term for a short-term anxiety reaction following a traumatic event, lasting from 3 days to 1 month.
事故の後、急性ストレス障害と診断された。
After the accident, I was diagnosed with acute stress disorder.
PTSD (post-traumatic stress disorder) is a longer-term condition lasting more than one month, while acute stress disorder occurs within the first month after trauma.
Compound of 急性 (acute) + ストレス (stress) + 障害 (disorder), a direct translation of the English medical term.