Vein in my wrist bulging

[Mumof4loves]

What’s wrong with my wrist? I was working out felt an itch on my wrist I looked down my vein was a bulging lump I woke up next morning it had flattened out but now it’s a large bruise. I wasn’t lifting weights I was doing cardio when this happened. Does anyone know what this could be

Sounds like you burst a blood vessel, you might have knocked it slightly but in just a way that caught it. If you were doing cardio all your blood vessels would be dilated and closer to the surface of you skin.