Random bruises?

Has anyone had unexplained bruising? In May I started getting random bruises all over my legs. The bruises come and go. Sometimes I have none and sometimes I’m full. I have NEVER bruised easily before, so I am really confused. I had my blood drawn in May and again in July and thankfully it was normal. However, the bruises are still coming and they are getting bigger and darker. My doctor said there’s nothing more she can do.

I’m just wondering if anyone else has experienced this and found the cause?