A few eyebrows are usually long due to normal physiological factors, which is a normal phenomenon, and a small portion is due to the side effects of drugs. 1. Normal physiological phenomenon: generally each eyebrow hair grows at a different speed, there may be a few eyebrows longer, genetic factors may also lead to a few eyebrows especially long, generally not accompanied by other symptoms, no effect on health, generally do not need treatment. 2. Side effects of drugs: due to the treatment of other diseases for a long time using hormone drugs, may also lead to a few eyebrows are particularly long, usually after stopping the drug will gradually relieve themselves, if necessary, can be trimmed, laser hair loss and other ways of treatment. It is recommended that healthy people with a few long eyebrows do not need to be overly nervous and take treatment measures, when accompanied by other discomforts, it is recommended to consult a doctor in time, in order to clarify the cause of the disease and symptomatic treatment.