Varicose Veins - How your Train Around Them?

Hey girls , wanted a little help from someone who might had to deal with this in her past.
A new trainee came to the gym i work in a few days ago and asked for advice about what kind of exercises she can do for her lower body that wont effect her situation.
She can do upper body work and she wants to. she can and does regular cardio (steady state no HIIT) and also studio classes (no spinning).
She says as soon as she does any lower body stuff her veins start “popping”.
any advice?