An itchy, red rash or red dots on the shins or legs may be symptoms of venous stasis dermatitis, which is caused by poor blood circulation or blood gathering or pooling in the legs.
Red veins on my legs may also indicate early signs of spider veins or underlying vein problems in the leg. These visible veins can worsen over time without treatment. Seeking evaluation from a vein specialist can help diagnose the condition and prevent further complications.
https://www.usaveinclinics.com/vein-disease-symptoms/