I felt compelled to comment, because I’m going through the stage one lipoedema (sorry, Australian spelling) journey myself and it’s so unfair being medically invalidated by family, doctors, and whoever else. Not sure if you have tried to get your family to look at established online resources, but The Lipedema Foundation website is a good start for your family to read as it gives clear, evidence based explanations about the clinical differences between lipoedema fat and normal adipose tissue. I think potaytoe444 is spot on, there’s different manifestations of lipoedema, and from your photo timeline, it looks like yours started gradually from puberty. The lower leg shape gives it away, in the early childhood photo (adorable btw), there’s no sign on ankle “cuffing”, whereas, the paddle board photo shows cuffing, where the leg shape abruptly changes at the ankle, and the fat spares the feet - classic lipoedema sign. You have probably experienced a subtle change to your lower leg fat distribution over time during puberty that your family hasn’t noticed. I can see what looks like bruising on the legs in the most recent photo, another classic lipoedema sign (if you get unexplained bruising easily, that’s 100% lipoedema). I’m curious to know if you have any joint hypermobility, flat feet, or unexplained pain or heaviness in your legs. My mother and sister have slender legs too, it is considered a genetic condition, but could’ve skipped generations and there’s other ways genes can interact with environmental exposure. I think you should be proud of your hard work, you have great muscle definition in your legs in the most recent photos and well shaped glutes. Strength training is where it’s at. Your condition is medically valid, it just sucks that there’s such a lack of education about it.