Spider veins are veins that are really close to the surface of your skin that have swollen up when that vein has had high pressure. so it’s likely johnssdeere that you always had those veins close to the surface of your skin but they’ve only just ‘swollen’ now and turned into spider veins.
I think they’re just genetic, I don’t think that activities can cause them. (this might be different with varicose veins though?) If anything, I think that being inactive would lead to more because in that case your circulation might not be as good.
I have spider veins as well, little patches of them on my legs that look like bruises, and on my cheeks and eyelids.
I don’t bruise that easily at all, Jenn1989, so I don’t know if that’s the culprit of your easy bruising. Have you been tested for an iron deficiency?