Hi Welcome to HCM
I have come to know through your query that you are feeling pain swelling in your left breast, arm pit area rediating to left arm also .
Dear , Instead of guessing , what and how could it happen , I suggest you to visit Your physician and take his sincere suggestion .
If I were your physician I would have reffered you to specialist to find out the root cause of the problem by the tests he prescribes to conduct . so Get diagnosed and start treatment ASAP.
Meanwhile I suggest to take care of your life style by taking simple ,healthy ,balanced diet with fibers ,protien
Vitamins ,minrals & lot of water . Also incude
antioxidants like ginger ,garlic ,onion , lemon juice twice befpre meals , and turmeric pwder after dinner before bedtime
Avoid fried fast foods colas,tea , coffee ,alcohol and constipation
Exercises that improve or maintain good posture, and strengthen your back and core muscles will help prevent swelling & pain . PROPER regular EXERCISE , WALK,
YOGA , pranayam -deep breathing proper rest HELP YOU TO STRENGTHEN YOUR IMMUNE SYSTEM and help you lead disease free life .
All the above is full of antioxidendants having no side effects giving you immunity to live life without diseases and can go with any therapy . Condition is to be regular with this regimem .
Hope this helps you in solving your query
All the best . Take Care .
Don 't hesitate to get back if have any further query