I am a 22 year old Male. From past 2 days I am feeling, itching feeling beside chest on left side, below underarm. There are no rashes and bumps ,marks etc. This itchy feeling occurs mostly? 2-3 inch below the under arm and randomly around left chest and back of shoulder. Scratching doesn't help .i have taken no medicine. Is this related to heart or posture because from past few weeks I have been in home only lying on my bed and programming. Should I worry.