Every time i shave my armpits i get at least 1 if not more ingrown hairs in both of them is there a reson they keeping coming everytime i shave?

Maybe an infection?: You may not be getting ingrown hairs, but rather an infection called folliculitis. Try to change your razor regularly and use a good shave cream or gel. An antibiotic cream or ointment may help treat it. If you are getting inflamed little bumps in other places, as well, you should probably see a doctor for an evaluation as you may need an oral antibiotic.

Technique ?: Insure you use fresh, sharp blades vice dull blades. If hair is > several mm long – then trim before shaving. Wash area before shaving – warm water helps to soften hair. Use a lubricant when shaving. Avoid using products that contain alcohol or are scented. Shave in direction of the hair – not against it. Be gentle when shaving – don’t push down too hard. Moisturize skin after shaving.