Combo brows and Nano brows are two popular techniques in the world of semi-permanent makeup, each with its unique benefits and potential drawbacks. The choice between the two largely depends on your personal preference, skin type, and the look you're aiming for.

Combo Brows, also known as combination brows, is a technique that combines microblading and shading. This technique is ideal for those who want a more defined and dramatic look. The microblading creates hair-like strokes for a natural appearance, while the shading adds depth and fullness. Combo brows can be a good choice for those with oily skin, as the shading technique tends to hold up better against oil compared to microblading alone.

On the other hand, Nano brows, also known as nanoblading or nano needling, is a technique that uses a digital machine with a single needle to create ultra-fine hair strokes. This technique is known for its precision and is ideal for those who want a very natural look. Nano brows can be a good choice for those with sensitive or mature skin, as the technique is less invasive and causes less trauma to the skin.

In terms of longevity, both techniques can last anywhere from 1 to 3 years, depending on your skin type and how well you take care of your brows. However, Nano brows might require more frequent touch-ups due to the delicate nature of the hair strokes.

In terms of pain and healing, Nano brows are generally considered less painful and have a shorter healing time compared to Combo brows. This is because Nano brows cause less trauma to the skin.

In conclusion, both Combo and Nano brows have their own advantages. Combo brows can provide a more defined and dramatic look and may last longer on oily skin, while Nano brows can offer a more natural look and are gentler on sensitive or mature skin. It's important to consult with a professional to determine which technique is best suited for your needs and preferences.