I haven’t had that happen, but it is precisely the kind of problem that I’m on constant vigilance about. I am 3 years post-bilateral mastectomy— congratulations on your 4 years! My cancer surgeon only reluctantly signed a referral to a lymphedema therapist because he said only about 20% of his patients develop lymphedema. 🤨 And I changed primary care physicians because one of the people on her staff literally argued with me when I said “no BP cuff” on my affected arm!
I do work with my lymph therapist on risk reduction... for example, I wear (Solidea low compression) sleeves anytime I do anything that might stress my (also left) arm (and I keep spare sleeves in my purse and car for unexpected “opportunities“), I do MLD massage on myself, I carry antibiotic cream and bandages at all times to put on any little nick or cut. I had 20 lymph nodes removed. I am taking your struggle to heart. Good luck! I’ll keep thinking of you.

I met a lady who has severe Lymphodema on her left arm - she said she is always vigilant as any slight injury, causes her severe cellulitis. She is also a BC survivor - but they took out 29 of her 30 lymph nodes on that arm, like 15 years ago. So she still has problems. All of her nodes were negative - but maybe that's what they did back then. Seems like the surgeon was crazy to me. Good luck & she was wearing a compression sleeve.