Hi, I have noticed a very tiny bump (about size of lump caused by mosquito bite)on my 14wk old son s shoulder. It is almost at the hand and shoulder joint slightly towards his back. It is skin colored and i can feel it. If i stretch the skin there then iam able to see it. It does not cause him any pain. It looks like hardening of skin due to an injection. Our doc says its due to bcg vaccine but it was given a bit up on his hand. He said there is no need to worry and will check after 2 months. he said it might get bigger and burst but by look of it it doesn t look like it will burst..please let us know your views..