The 30-year-old eyebrow hairs have a few especially long is generally a normal physiological phenomenon, may also be due to the side effects of drugs. 1. Normal physiological phenomenon: there are a few eyebrow hairs longer may be related to the hair follicle base of the capillary is more developed, higher levels of androgen, genetic factors and other factors, just eyebrow hairs in the growth of an individual case, if not accompanied by other abnormal symptoms, considered as a normal physiological phenomenon, generally have no effect on health, do not need treatment. 2. Side effects of drugs: due to the treatment of psoriasis, eczema and other diseases, the local long-term use of glucocorticoid drugs, may also lead to the eyebrows have a few especially long, it is recommended to consult a doctor, if necessary, can be in the choice of plucking, trimming, laser hair removal and other ways to remove, but do not blindly use unqualified depilatory creams, in order to avoid damage to the skin or cause irritation and allergies. It is recommended that 30-year-old eyebrows have a few particularly long healthy people, do not need to be overly nervous, generally do not need to take treatment measures, if accompanied by other discomfort, it is recommended to consult a doctor in a timely manner, in order to clarify the cause of the symptomatic treatment.