If the technician uses dirty water or equipment, it can spread bacteria such as staph (staph). They could also spread viruses such as HIV, hepatitis or herpes. The skin may also react adversely to the pigment used in the procedure. This is usually considered an allergic reaction.
Be aware that redness and mild to severe pain are to be expected when you leave the technician's office. However, special attention should be paid to the area and if it rises or swells or if you notice any yellow discharge or an excessive amount of redness, this may be a sign of infection. Beauticians promote microblading as the semi-permanent makeup solution for perfect eyebrows, but it's a technique that can leave you with disastrous results. The main (and scariest) problem with microblading is that the procedure cuts the skin to deposit the pigment.
Every time the skin is cut, there is a serious risk of infection and scar tissue. While microblading is less invasive than tattooing, it still involves penetration into the skin. Like tattoos, one of the main risks of the procedure is infection. It is important to be diligent to find a clean and safe establishment.