flare up -
ignite quickly and suddenly, especially after having died down; "the fire flared up and died down once again"
ignite,
light cause to start burning; subject to fire or great heat; "Great heat can ignite almost any dry matter"; "Light a cigarette"
kindle,
inflame cause to start burning; "The setting sun kindled the sky with oranges and reds"
flare up -
erupt or intensify suddenly; "Unrest erupted in the country"; "Tempers flared at the meeting"; "The crowd irrupted into a burst of patriotism"
