hello, i am a 41 year old mother of three and i noticed a little bump under myright arm lately. whenever i touch it or massage it , release gas through my mouth. I also find it irritates me, perhaps because I shaved a few weeks ago and there is new growth in that area, but I just find it a little annoying, when i get a scappy feeling underarm. My right arm arm also feels a little heavy sometimes. I do have flabby arms and weigh 75 kg. I wondered if you could tell me what the little bump can be, . It feels soft and though hardly noticeable, it feels a little annoying. thank you