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I remember a woman I dated in my early 20s who while dating began switched her birth control and as a result her breasts were always sore, grew quite a bit and so forth. She never complained about where the pain lead to, and would make light of it by comedically saying "no pain no gain". In ignorance I'd joke they couldn't hurt that bad and she'd be mad that I downplayed what she was feeling.
Fast forward, while some aches and pains have been present in the growth I've experienced. The current state of things is the worst. It feels like something is constantly poking deep in my tissue all over the side wall and under areolas and an insanely annoying tingling feeling. I remember she would put a heating pad on her chest to ease things up a bit and did the same these last few days with a warm rag and it definitely helped.
We're still friends on social media, though we never talk at all, just friends who aren't friends lol. But when scrolling the other day saw a post she made about something not related at all. But just wanted to message and be like "i'm sorry i ever doubted how much it can suck to feel yours breasts growing". Obviously didnt lol but it just reminded me that yup, no pain doesn't always equal no gain. But it definitely seems to be more true than not, when there's pain....there's gain coming