Certain conditions may trigger additional production of blood cells. When the oxygen content of body tissues is low or the number of red blood cells decreases, the kidneys produce and release erythropoietin, a hormone that stimulates the bone marrow to produce more red blood cells.The bone marrow produces and releases more white blood cells in response to infections.ertain conditions may trigger additional production of blood cells. When the oxygen content of body tissues is low or the number of red blood cells decreases, the kidneys produce and release erythropoietin, a hormone that stimulates the bone marrow to produce more red blood cells.
A Painful Armpit Lump may be Caused by Shaving or Deodorant. Although a painful armpit lump may have many causes there may be a very simple explanation for your condition. âCysts and infections on the surface of the skin of the armpit may be caused by shaving or use of antiperspirants (as opposed to deodorants).
Your armpit skin is close to your breast, so during radiation your armpit may get irritated and sore while you're being treated. In addition to the radiation, your arm rubbing back and forth on the skin, along with the sweat and hair that's there can make the area more irritated than your breast. Don't shave your armpit during your radiation treatment. 2  Wear loose clothing and try to keep your arm away from your body as much as you can. 3  Try applying aloe vera lotion/gel or hydrocortisone cream if your armpit skin is itchy and pink. 4  Use warm rather than hot water while showering.