Nano brows, also known as nano needling or nano blading, is a semi-permanent cosmetic tattooing technique that creates the illusion of fuller, more defined eyebrows. However, the term "permanent" can be misleading.

The pigment used in nano brows is implanted into the skin using a handheld tool with an ultra-fine needle, hence the name "nano". This method is different from traditional tattooing in that the pigment is not implanted as deeply into the skin. As a result, the results of nano brows are not permanent in the traditional sense.

Typically, the results of nano brows can last anywhere from 1 to 3 years, depending on several factors. These factors include the individual's skin type, lifestyle, and skincare routine. For instance, oily skin types or those who frequently exfoliate may find that their nano brows fade faster.

It's also important to note that nano brows require touch-ups or "color boosts" to maintain their appearance. This is usually done every 12-18 months.

In conclusion, while nano brows provide a longer-lasting solution than daily eyebrow makeup, they are not permanent. They require maintenance and touch-ups to keep them looking their best. Therefore, it's crucial to have realistic expectations and to follow the aftercare instructions provided by your technician for the best results.

Remember, it's always important to do your research and choose a qualified and experienced technician when considering any form of cosmetic tattooing.