The older you get, the less collagen you produce. Collagen, a protein that supports the body’s soft tissue, is what gives lips their volume, plumpness and definition. The sun’s UV rays can also cause collagen to break down and lips to thin. As we age the skin above the upper lip becomes more lax, causing the upper natural lip to roll in toward the teeth.
Causes of Thin Lips
A breakdown of natural collagen is the most common cause of thinning lips. The upper lip typically changes the most, lengthening over time. Family genetics, repeated pursing or puckering, dehydration, sun exposure and smoking can also contribute to Thin Lips.