Glomus tumour represents a benign tumor which originates from myoepithelial cells of arteriovenous anastomosis that has a preference for subungual localization with painful and multiform symptomatology. A fifty-year-old female presented a vasospastic symptom with hyperalgesia and cold hypersensitivity in the fourth finger of the right hand. There was a little palpable tumefaction and after an echography, we decided for surgical revision. Differential diagnosis with Raynaud's phenomenon is very important but not simple. The diagnosis is often late. MRI and angio-MR with its typical symptomatology could give the accurate diagnosis. The therapy is only surgical. The excision must be very careful making sure to spare the nervous structures.