This is a normal tissue response and not cause for concern
Melanotan 2 and Hunger Research There is good evidence to suggest that MT-2 can reduce fat storage and hunger behavior in animal models
HOLST: The Gila monster, it was actually a great inspiration, so the study where we demonstrated the effect in diabetes was from 1993, and that's what convinced at least some of the pharmaceutical companies, and certainly Novo Nordisk in Denmark, that perhaps it was worthwhile working with this peptide, and that's why, that's when they started developing what later became liraglutide or Victoza
PLoS ONE 10:e0126606 Spiekerkoetter U, Wood PA (2010) Mitochondrial fatty acid oxidation disorders: pathophysiological studies in mouse models
Conclusion Achieving celebrity-worthy skin is not as unattainable as it may seem
Brain Behav 12:e2513 Inano A, Sai Y, Nikaido H, Hasimoto N, Asano M, Tsuji A, Tamai I (2003) Acetyl-l-carnitine permeability across the bloodbrain barrier and involvement of carnitine transporter OCTN2