A portable skin diagnosis device (1)comprising: · a first measuring system comprising: · a diffuser · an acquisition opening (5) for placing in front of the skin · a lighting system that is placed behind the diffuser so as to illuminate the skin in the acquisition opening (5) via the diffuser and · an optical detector that receives the light reflected by the skin placed in the acquisition opening and · a second measuring system that is configured to take a measurement on the skin in a manner that is not optical.