My cousin criticized what I told my girlfriend

I’ve had a tough time for years because of my skin, but I finally found a specialist dermatologist and started a treatment. I talk about my skin often with my boyfriend because he supports me so much and is very helpful in this process. But the other day my cousin said, ‘You’re going into so much detail with everyone, just stop obsessing over it.’ Could she be right? But after all, it’s a sensitive topic for me.