Any smell that is too intense can cause headaches in people. This is the body's natural signal that a sensory influence is being stimulated too strongly. In general, we advise against overly aggressive room fragrances and recommend a subtle and unobtrusive fragrance. We are not aware of any cases of headaches when the intensity of the room fragrance was chosen according to our recommendation and the tested dosages. Even for sensitive people, a subtle fragrance represents a clear added value.