Main differences
1. They use different technologies to heat up the deep skin tissues. HIFU delivers more precise and more intense fractional ultrasound energy to goes to the SMAS layer, while RF is based on a bulk heating strategy.
2. HIFU goes much deeper into and beyond the dermis, being able to reach the SMAS layer (muscle). RF, on the other hand, will not go as deep as HIFU. It focuses on epidermal layers and does not go beyond the deep dermis. This is why HIFU is much more effective than RF.
3. HIFU is generally performed as a single treatment RF may require several sessions. The exact frequency of either of those treatments will depend on the type of device used and your skin conditions such as its current elasticity or your genetic heritage.

How to choose between HIFU and RF
As we age our face starts to exhibit a mix of sagging, wrinkling and sinking. Although each person’s ageing style is always unique and should always be addressed individually the following guide explains how different treatments may be more suitable for different types of issues.

Problem Areas:
1. Sagging: HIFU is the best choice as it tightens the SMAS layer (muscle) of the skin which reverses the sagging appearance. HIFU assists in tightening loose skin around the jowls, improve the appearance of a double chin or “lifting” the brows. The skin lifting and tightening effects will give the appearance of a slimmer face, sharp jawline and double chin reduction. Further, it can also get rid of any excess fat and tissue in the lower face that’s worsening the sagging effect.
2. Volume loss: RF being a less intensive method that penetrates tissues not as deep as HIFU can be a better choice for addressing volume loss or treating delicate areas such as lower and upper eyelids. Thus, if you have no or limited skin laxity, but are losing facial volume you may opt for the RF. It will tighten the skin but also create the effect of more volume especially in the area around the mouth.
3. Wrinkles & fine lines: Both HIFU and RF boost collagen production and accelerate skin tissues remodelling. Thus, they’re both effective in treating wrinkles and fine lines. The best method for treating the signs of skin degeneration will thus depend on the extent of your skin ageing and the area you want to treat. For this reason, any deep lines and wrinkles should be address with HIFU due to its skin tightening properties as RF does not target deep within the SMAS (muscle layer).