Your armpit can tell you a lot about the state of your immune system. In fact, if there is no pit under your arm, it could be a warning sign that your lymph is backing up in your tissues and putting you at risk of illness.
That’s because the armpit is toward the endpoint of the lymphatic drainage system. Certain behaviors that many women engage in can restrict the flow of lymph in that area of the body causing an arm “puff” where the armpit should be. That includes using antiperspirants, shaving, and wearing tight clothing, especially bras.
