cause of armpit pain

Common causes of armpit pain
Wide-ranging factors cause underarm pain, including skin conditions, infections, and immune conditions.
Depending on the cause and severity, symptoms vary from mildly irritating to extremely uncomfortable and distressing.
Common causes of armpit pain include:
Swollen lymph nodes
The lymph nodes are crucial to a successful immune response. They round-up foreign bodies and stimulate the release of immune cells, which destroy and remove these invading bodies.
During bacterial, fungal, and viral infections, the lymph nodes fill up with invading cells and begin to swell. This enlargement causes inflammation and pain.
Causes of swollen lymph nodes include:
·         the common cold
·         upper respiratory infection
·         viral infection
·         strep throat
·         ear infection
·         measles
·         mononucleosis
·         tooth infection
·         wounds and skin infections
Allergens and skin irritants
Many deodorants, antiperspirants, body washes, soaps, and laundry detergents contain known skin irritants and allergens.
Some irritants and allergens lead to allergic contact dermatitis, a condition that causes redness and tiny blisters.
Similarly, irritant contact dermatitis can result in redness, pain, swelling, and heat.
Pets and environmental factors also carry known allergens that cause an immune response and, by extension, armpit pain.

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