Understanding Pain Under the Right Armpit: Causes and Relief

Pain under the right armpit has various causes, not always serious. Potential causes:

1. Muscle strain/sprain: Overexertion, injury, repetitive motions.
2. Lymphadenitis: Inflamed lymph nodes from infection or medical conditions.
3. Breast-related conditions: Blocked milk duct (lactating women), menstrual cycle changes.
4. Nerve compression: Brachial neuritis, thoracic outlet syndrome radiating from neck/shoulder.
5. Skin infections: Boils, abscesses causing pain, swelling, tenderness.
6. Hernias: Axillary hernia protruding through weakened muscle.
7. Respiratory issues: Pleurisy, lung infections (especially with respiratory symptoms).
8. Liver/gallbladder problems: Referred pain from right upper abdomen.
9. Gastrointestinal conditions: Gastritis, ulcers referring pain to armpit.
10. Cardiovascular conditions: Rarely, angina (reduced heart blood flow).

Consult a healthcare professional if pain persists, worsens, or accompanies fever, swelling, or breathing difficulty.