Seek medical evaluation for persistent swelling, cold feet, walking-related cramps, discoloration, slow-healing sores, or veins that become hard, warm, or painful. A newly painful, swollen leg needs urgent assessment for a possible blood clot; accompanying chest pain or breathlessness requires emergency help. Regular movement, avoiding smoking, and managing diabetes or high blood pressure support circulation. Supplements marketed for circulation are not substitutes for care: evidence varies, and some interact with medicines or increase bleeding risk. The safest approach is to notice symptoms and changes—not assume every visible vein means danger.
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