Is it normal to have a burning sensation under my arm pit when I lift my left arm?

Thank you for your question.  I am going to have to make certain assumptions to give you a specific answer.  I am going to assume you had your breast augmentation through the armpit, and probably underneath the muscle.  If this is true, then you may have clotted lymphatic vessels that stretch from your armpit all the way down to your wrists, and there is also very often scar tissue in your armpit as well.  Lifting your arm tugs on these scars and clotted vessels, and very often gives a tight searing feeling.  The good news is this always goes away.  At this point, I think it would be appropriate to speak to your plastic surgeon.  He or she may have specific paradigms for stretching the armpit tissue which will then allow it to loosen which, of course, alleviates the tight searing pain.

It is normal to have pains like this for some time after breast augmentation.  It should go away of you are careful with your activities.