There are a range of synonyms that can be used to describe a "minor flare". These might include terms such as "blip", "hiccup", "flicker" or "spark". Other options might include "trifle", "slight disturbance", "minor disruption" or "small outbreak". Each of these terms can be used to describe a situation that is not significant enough to warrant major concern or action, but still represents a small problem or disturbance. Whether describing a technical glitch, a minor medical issue, or a small-scale incident, these synonyms can add variety and nuance to a writer's vocabulary.