What could cause a severe burning and stinging sensation in my armpit?

Salmonella Nutrition Bars • Children Staph Infection • How to Reduce LDL • Life Expectancy Emphysema • Itchy Swollen Eyelids • Fibromyalgia Disability • Bone Density Medications • Causes of Swelling • Pregnancy Brown Discharge • Sore Neck Glands • Itchy Rash on Arms • Itchy Throat Cough • Pinched Nerve Neck Symptoms • Burning Sensation During Urination • Blood Clots During Period • Swollen Lymph Node Armpit • Causes of Lump • Causes of Itching • Swollen Lymph Nodes Groin • Signs of Pregnancy Before Missed Period • Causes of Rash • Toddler Rashes • Coughing Up Phlegm • Enlarged Groin Lymph Nodes • Early Pregnancy Brown Discharge • Gillian Barre Syndrome • Sore Throat Body Aches • Symptoms of Swelling • Side Effects of Flu Shot • Distended Abdomen