It sounds frustrating to experience changes after many years of successful treatments. The redness and blurred lip borders you're describing could be related to a few different factors, but the good news is that it's likely treatable. Here are some possibilities and treatment options: 1. Filler Migration: Over time, filler can migrate slightly beyond the lip borders, creating a blurred or puffy appearance. Even if you don't feel lumps, the product may have subtly shifted over time. Treatment: A mild amount of hyaluronidase can dissolve the migrated filler while leaving the rest intact, allowing your injector to refine the lip border. 2. Skin Thinning or Sensitivity: After many years of treatments, the skin around the lips may have thinned slightly, causing more noticeable changes in texture or color. This can lead to a blurring of the lip line. Treatment: A combination of light skin resurfacing (like laser or microneedling) or specific topical treatments to strengthen the skin barrier and reduce redness could help. If needed, a small amount of filler can also be placed along the vermilion border to better define the lips again. 3. Vascular Changes: Long-term filler use could cause subtle vascular changes around the lips, contributing to redness. Though not harmful, this could be cosmetically bothersome. Treatment: Light laser treatments (such as IPL or vascular lasers) can reduce the redness above your lips by targeting any visible blood vessels or capillaries. 4. Post-Inflammatory Hyperpigmentation or Irritation: Although you don't have irritation or pain, there could be mild, subclinical inflammation leading to redness and discoloration. Treatment: Topical treatments with anti-inflammatory ingredients like niacinamide, peptides, or calming agents could help. Your dermatologist might also suggest a mild steroid cream for short-term use to reduce inflammation.