Semi-permanent hairline tattooing is a procedure to improve the appearance of the high hairline by using pigments similar to my hair color to make the hair volume look thicker one by one, at the part of the hairline where there is more hair loss. The following risks may exist: 1, cross-infection: if the tattoo needles used for hairline tattooing are not strictly sterilized, and many people share a set of tattoo needles, it is easy to cross-infection, resulting in hepatitis, AIDS and other blood-borne diseases; 2, semi-permanent hairline tattooing failure: a high hairline or a low hairline or strange shape, generally due to the doctor’s skills are not up to scratch; 3, post-operative infection: with aseptic Operation is not strict, improper postoperative care, etc., after surgery should be routinely applied antibiotics to prevent infection for a week, the wound can not be wet, every 1-2 days should be changed, review; 4, scalp injury: if the operator did not place the tattoo needle, may lead to tattoo needle off, damage to the scalp; 5, subcutaneous bruising, hematoma: due to the syringe injection anesthetic pierced blood vessels, resulting in subcutaneous bleeding, skin performance bruising; 6, frontal skin scarring, etc. The skin of the forehead produces scar growth: the damage is too large resulting in. In summary, it is recommended that candidates choose a regular hospital and doctor for this surgery, and to listen to the doctor’s advice and perform strict post-operative care to prevent complications.