Hello,
Since you are having pain in both the armpits it can be infection because of shaving, skin irritation, lymphedema, cancer, etc. However, it can be due to
muscle strain or stress that can be healed by application of ice packs and rest.
Fibromyalgia can cause painful
swollen lymph nodes in the armpits. You are suggested to get clinically examined by GP, get few blood tests,
urinalysis and imaging tests (X-ray, MRI, CT) done to detect the pathology causing you hurt and discomfort. you will be treated accordingly.
In the meantime, take adequate sleep & rest. You can take
acetaminophen, one SOS when needed to ease pain. Stay away from addictions if any. Take home made nutritious food avoid stressful lifestyle. Avoid wearing tight fitting clothes and jewelry. Avoid hot water baths and excessive exposure to sun. For gastritis, you can take antacids and PPIs, one SOS when needed.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Nupur K., General & Family Physician