First a felt a little pain under my arm a think a day after I shaved it, I just felt that maybe I just nicked my self like I do cause the pain was normal, but then the next day I would left my arm and the pain was a bit wores, and then I notice a lump or something. The pain lasted for a couple of days or so, and the lump began to get smaller and smaller. When I left my arm up I can notice it, but it's not causing any pain now, and it's been about 2 months.