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    Why do my legs feel worse in hot weather?

    Hot weather is one of the common reasons for swollen legs the NHS lists, and many people notice heavier legs and swollen ankles on hot days. If it is strong every summer, it is worth knowing why.

    Common reasons

    Fluid build-up (oedema)

    Swollen ankles, feet and legs are common and often come from heat, standing or sitting for long periods, or some medicines. It usually settles, but ongoing or one-sided swelling needs a doctor.

    Source: NHS: Swollen ankles, feet and legs (oedema)

    Varicose veins

    Swollen, twisted veins can cause aching, heaviness, swollen ankles and night cramps, often worse in warm weather or after standing for a long time.

    Source: NHS: Varicose veins

    Lipedema (lipoedema)

    A long-term condition that mostly affects women, where fat builds up evenly on both legs and hips, sometimes the arms, but usually not the feet. Legs can feel heavy, tender or painful and may bruise easily.

    Source: NHS: Lipoedema

    Could it be lipedema?

    NHS inform notes that lipedema swelling can get worse in hot weather. Common signs listed by the NHS include both legs being affected in the same way, feet usually staying slim, skin that feels soft and cool or dimpled, bruising easily, and heaviness or tenderness that can get worse later in the day or in hot weather.

    See how many lipedema signs your legs share in the leg check →

    Start a leg diary before your appointment

    Doctors often ask when it started, when it is worse and what seems to make a difference. A few weeks of notes turn “it’s just bad sometimes” into something you can show. Worth writing down:

    • The temperature that day
    • How your legs feel morning and evening
    • Water and salt
    • Time on your feet

    How Renya helps

    Renya is a daily diary for your legs. Rate how your legs feel morning and evening, snap your meals, tick off habits like a walk or compression socks, and add sleep, stress and your cycle.

    After about a week of entries, Your patterns shows how food, sleep, activity and stress line up with your better and harder leg days; cycle patterns need about two cycles. You see your own patterns side by side, and you have a clear record to bring to your doctor. Renya does not diagnose anything.

    Start your leg diaryOr take the 2-minute leg check

    iPhone subscription app. 7-day free trial on the annual plan.

    Get help the same day if

    • one leg is suddenly swollen, or has throbbing pain, usually in the calf or thigh
    • the skin around the painful area is red, darkened or warm
    • swelling is severe, painful, starts very suddenly or follows an injury
    • you also have swelling in your face or tummy, or a high temperature

    Call emergency services if leg pain or swelling comes with breathlessness or chest pain.

    Based on NHS: DVT and NHS: oedema.

    Questions people ask

    Mild swelling in the heat is common and usually settles overnight. Swelling in one leg, or swelling that does not go down, needs a doctor.

    Finding a doctor who knows lipedema

    A GP or family doctor is a good first step. Lipedema is still not widely known, so many women also look for a clinician who lists it in their work. These organisations keep directories or support networks:

    Renya is not connected to these organisations and does not recommend individual clinicians.

    Related

    Sources

    Written by the Renya team from NHS and other public sources listed above.

    This page is general information, not medical advice or a diagnosis. Renya is a wellness diary and does not diagnose or treat any condition. If you are worried about your legs, talk to a doctor.

    See your own leg patterns

    Check in on your legs, snap your meals and see what lines up with your harder days. iPhone subscription app. Android coming soon.

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