Thank you for your thoughtful question. Crepey skin on the arms is a common concern, especially as we age or after weight loss, and while an arm lift provides the most dramatic results, it's understandable to want to avoid the scarring. Here’s how Ultherapy, Ellacor, and microneedling compare for your situation: 1. Ultherapy (Ultrasound Skin Tightening) Effectiveness: Moderately effective for mild skin laxity, particularly in younger patients or early stages of crepiness. Mechanism: Uses focused ultrasound to heat the deeper dermis and stimulate collagen. Results: Gradual improvement over 2–3 months. May require repeat treatments. Limitation: Less effective for moderate to severe crepiness or where there is significant volume loss. 2. Ellacor (Micro-Coring Technology) Effectiveness: Most promising among the three for crepey skin. Mechanism: Removes tiny cores of skin (without scarring) to stimulate skin tightening and collagen remodeling. Results: Noticeable improvement in skin texture and tightness after 2–3 sessions. Limitation: Currently FDA-approved for the face but has shown potential off-label for the body. Not yet widely used on arms, but emerging data is encouraging. 3. Microneedling (With or Without RF) Effectiveness: Best when paired with radiofrequency (RF microneedling). Mechanism: Creates micro-injuries that prompt collagen production; RF adds heat for deeper tightening. Results: Gradual skin firmness and smoother texture after a series of treatments. Limitation: Results are subtle and require maintenance. Most effective when crepiness is mild. Recommendation Summary If you're aiming for modest improvement and minimal downtime, RF microneedling is a good starting point. For a more aggressive and innovative non-surgical option, Ellacor may offer the best results long-term—particularly if adapted for arms. Ultherapy is a safe option but generally less impressive for arm crepiness compared to other areas like the face or neck. It’s great that you’re exploring all your options—being realistic about results while prioritizing non-surgical solutions is the right approach.