Hello doctor i am 16 year old male and recently i am observing a slight lump over my left nipple tip( slight upwards). is it normal? also when i touch it feels like a ball and is movable?

About a half of males will undergo a transient nipple/breast enlargement at the onset of puberty on one or both sides. Normally it will resolve slowly as other hormonal changes kick in over about a year. Carrying around extra weight can aggravate the issue as fat can masquerade as breast tissue.

The description you provide is a bit vague: it could be a supernumary nipple, or a lymph node, or folliculitis ( irritation of the hair follicle) . Do not continue to manipulate it. Please seek attention form your primary care doctor.