microneedling
noun [ U ] (also micro-needling) uk/ˈmaɪ.krəʊˌniːd.lɪŋ/ us/ˈmaɪ.kroʊˌniːd.lɪŋ/
（改善皮肤的）微针治疗，微针美容
a medical or beauty treatment that involves putting a very small needle into the skin many times, which is thought to help the skin to repair itself