Can varicose veins cause pain for someone even he did not do any exercise and is at rest?

Yes: Wear knee high support stockings and see a vascular surgeon if symptoms persist

Multiple symptoms: Varicose veins can cause many symptoms including pain, aching, swelling, cramping , heaviness, tired legs or even restless legs. When there is pain it is often times associated with a clot in the vein (superficial phlebitis). The most common symptom of varicose veins is aching of the legs. It would be prudent to see a vein specialist for a full venous evaluation with a venous ultrasound.

Yes: Varicose veins are the result of faulty vein valves within the visible surface veins as well as the underlying "feeder" vein that is causing them. The faulty valves lead to constant stretching & pressure buildup in the veins that can lead to pain even when at rest. When standing the pressure & symptoms typically worsen. If the veins get inflamed with phlebitis there can also be increased pain.