Researchers in the US have warned that going for a permanent makeup to enhance appearance could lead to disfigurement, especially in people who suffer from allergic reactions.
In the permanent makeup procedure pigments are injected into a deep layer of skin called the dermis to enhance eyebrows, eyelids and lips.
A study published Thursday in the New England Journal of Medicine said that the very procedures that are supposed to enhance beauty might actually result in unsightly side effects such as swelling or bumps.
Researchers from the Centre for Disease Control and Prevention (CDC) interviewed 92 women who had problems following the procedure.
The researchers found that more than nine out of ten women had swelling and tenderness and almost as many complained of itching with more than four out of five experiencing bumps.
In 43 out of 63 cases, the reactions had not healed at the time of the interview and the allergic reaction lasted anywhere from five months to more than three years, reported science portal News Medical.
According to US Food and Drug Administration (FDA), the permanent makeup process could cause long-term disfigurement for patients who suffer allergic reactions. FDA researchers said that when things go wrong they may be particularly bad because the pigments can be hard to remove.
More than eight million women undergo such procedures in the US alone to supposedly enhance their appearance. The concept is catching on fast in developing countries like India.