Yes, that statement is generally true: many cases of swollen ankles in summer are not caused by heart or kidney disease. Warm weather commonly causes dependent edema (fluid collecting in the lower legs and ankles) because heat makes blood vessels widen and allows more fluid to move into surrounding tissues. Standing or sitting for long periods can make it more noticeable.
Common non-serious causes include:
- Heat-related fluid retention
- Long periods of standing or sitting
- High salt intake
- Tight shoes or clothing
- Mild vein circulation problems (venous insufficiency)
- Certain medicines (for example, some blood pressure medications)
However, ankle swelling can sometimes be linked to heart, kidney, liver, blood clot, or other medical problems—especially if it is new, severe, or accompanied by warning signs such as:
- Shortness of breath or chest pain
- Swelling that is sudden or only on one leg
- Redness, warmth, or significant pain in the swollen area
- Rapid weight gain
- Swelling of the face or around the eyes
- Reduced urination
- Severe fatigue or worsening symptoms
Simple measures that often help heat-related ankle swelling:
- Elevate your legs when resting
- Walk and move your ankles regularly
- Avoid sitting or standing still for long periods
- Reduce excess salt
- Stay hydrated
- Wear comfortable, supportive footwear
If ankle swelling keeps returning, is getting worse, or you have other health conditions, it is worth discussing with a clinician rather than assuming it is only the weather.
