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).
Underarm heat rash and sweat rash. Another common armpit skin rash cause is sweat rash which is primarily caused by blocked sweat ducts that âtrap perspiration under your skin. Symptoms range from superficial blisters to deep, red lumps â [mayoclinic.org].nderarm rash due to due to allergic reaction or contact dermatitis. Allergic reactions to various chemicals such as soap, shaving creams, body lotions, cosmetics, certain synthetic clothing material, fragrances, or detergents used to clean your clothes can cause rashes especially red itchy rashes.