From your description, these are likely to be Varicose Veins
You need to see a Vascular Interventional Radiologist
to have a Doppler Ultrasound
to confirm these.
This can then be treated by an Interventional Radiologist like myself by either Endovenous Laser or Radiofrequency Ablation
done by a minimally invasive method.
Consultant Vascular Interventional Radiologist