noun
active phase (of an illness); duration of an episode
Medical term used in psychiatry and general medicine to refer to the period when symptoms are actively manifesting. Often used in contexts like 病相期の治療 (treatment during the active phase).
統合失調症の病相期には、幻覚や妄想が現れることが多い。
During the active phase of schizophrenia, hallucinations and delusions often appear.
うつ病の病相期が長引くと、日常生活に大きな支障をきたす。
If the depressive episode persists, it greatly interferes with daily life.
寛解期 is the remission phase when symptoms are reduced or absent, contrasting with 病相期, the active symptomatic phase.
Compound of 病 (illness), 相 (phase, aspect), and 期 (period). The term is a modern medical coinage, likely derived from clinical descriptions of disease phases.