Translation guide
The English phrase 'flaring up' can refer to a sudden increase in intensity, such as a fire, emotion, conflict, or medical condition. This guide covers natural Japanese expressions for each of these situations.
To describe a fire, flame, or light that suddenly becomes stronger or brighter.
Intransitive verb meaning 'to blaze up' or 'to flare up'. Used for flames or fires suddenly growing larger.
The fire flared up in the wind.
Slightly more formal or dramatic; often used for large fires or metaphorical 'going up in flames'.
The hut flared up in an instant.
To describe anger, a dispute, or strong feelings that suddenly become more intense.
Common for conflicts, disputes, or situations escalating. Neutral to formal.
The protests flared up.
Literally 're-ignite'. Used when a conflict or emotion that had subsided flares up again.
The conflict flared up again.
For anger specifically flaring up explosively.
His anger suddenly flared up.
To describe a disease, pain, or symptom that suddenly becomes more severe.
Standard term for a disease or symptom recurring or flaring up after a period of remission.
My back pain flared up again.
General term for 'worsen'. Can be used for symptoms suddenly getting worse.
The symptoms flared up suddenly.
Colloquial for a condition returning or flaring up again, often used for colds or pain.
To describe fighting, riots, or trouble that suddenly starts or intensifies.
再発 is used for medical recurrences, while 再燃 is for conflicts or emotions re-igniting. Using 再発 for a fight sounds unnatural.
Do not directly translate 'flare up' as フレアアップ or 燃え上がる for non-fire contexts. Use the appropriate verb for the situation.
My cold flared up again.