My sister and I (15F and 20F) have matching lesions on our legs that are growing and multiplying... should we be concerned?

Having a medical issue? Ask a doctor or medical professional on Reddit! All flaired medical professionals on this subreddit are verified by the mods.

My sister and I have similar lesions on our knees that keep getting bigger

**Welcome to /r/DermatologyQuestions!** Got a rash, bump, or skin concern? Ask here. Get support and insights from the community. Please remember, this is not a substitute for professional medical advice.