Varicose Veins in Summer: How Heat Affects Your Veins

Yes, heat can worsen swelling, heaviness, a feeling of fullness, and fatigue in the legs. At high temperatures, blood vessels dilate, making it harder for venous blood to return upward. Fluid loss through sweating further changes the strain on circulation. This is why varicose vein symptoms may become more noticeable in summer, but treatment does not necessarily need to be postponed until a cooler season.

Feeling worse in summer does not always mean the disease is progressing rapidly. Symptoms may increase because of heat, prolonged standing, flights, inactivity, and insufficient water intake. It is important to distinguish a usual worsening of chronic symptoms from a condition that requires urgent medical assessment.

Why Legs Swell and Feel Heavy in Hot Weather

Leg veins return blood to the heart not only through the work of the heart itself. They are assisted by venous valves, contractions of the calf muscles, and normal mobility. When walking, the calf muscles compress the veins and help blood move upward.

Several processes occur in hot weather:

• blood vessels dilate so the body can release heat;
• more blood temporarily remains in the veins of the lower limbs;
• during prolonged standing or sitting, the calf muscles work very little;
• the body loses water through sweating, especially when a person drinks too little;
• fatigue, fullness, and burning sensations in the legs develop more quickly.

If venous valves do not function optimally, blood can stagnate more easily in superficial and deep veins. Some fluid leaves the vessels and enters the tissues. By evening, marks from shoes, swelling around the ankles, heaviness, and a desire to elevate the legs may appear.

Summer swelling alone does not confirm varicose veins. Similar symptoms can occur with conditions affecting the joints, lymphatic system, heart, kidneys, and with other conditions. If swelling recurs, worsens, or has appeared for the first time, its cause should be assessed in person rather than treatment being selected based on symptoms alone.

Read more about common symptoms in the materials on heaviness in the legs and leg swelling.

What Actually Helps in Tashkent's Heat

When temperatures approach 40 °C, it is important to reduce overheating and avoid prolonged venous stagnation.

Hydration. Drink water regularly without waiting until you feel very thirsty. The appropriate amount depends on your health status, physical activity, diet, and any conditions for which a doctor has restricted fluid intake. Do not replace water with large amounts of sweet drinks or alcohol: they do not address overheating and may make you feel worse.

A cool shower. Cool, but not icy, water applied to the calves may temporarily reduce the sensation of heat and fullness. Direct the water flow from the feet upward, without strong pressure or prolonged exposure. Hot baths, saunas, and intensive warming of the legs may increase blood vessel dilation.

Resting while lying down. If your legs are tired or swelling appears by evening, lie down for 15-20 minutes with your calves on a bolster or pillow. Your feet should be slightly above pelvic level, without painful bending at the hip joints. This does not treat varicose veins, but it may help reduce congestion and provide temporary relief.

Movement. If you sit for a long time, stand up every hour, walk a little, and flex and extend your feet several times. If you need to stand for a long time, shift your weight from one leg to the other and periodically rise onto your toes. Choose times for walks when the sun is less intense.

Footwear. In summer, choose comfortable shoes with stable soles and enough room for the toes. Constantly wearing high heels limits calf muscle activity. Very flat shoes that do not support the foot well can tire the legs quickly. Sandals and straps should not compress the ankle or leave deep marks.

Is Compression Needed in Hot Weather?

Compression hosiery may reduce venous congestion and swelling. It should be selected not according to the principle of “the stronger, the better,” but based on size, style, compression level, and medical indications. For symptom prevention during a flight, trip, or prolonged standing, a light compression class may sometimes be sufficient. Other situations may require a different option.

It is more convenient to put on compression hosiery in the morning, when swelling is minimal. Wear it while walking, standing, working, or traveling. Compression garments are removed at night. If it becomes too hot, you are at home, and can lie down with your legs elevated, temporarily removing the hosiery is acceptable. However, it is better to put it on before prolonged standing or walking; otherwise, there will be less protection against congestion.

Do not tolerate chafing, numb toes, a cold foot, or sharp pain. Remove the garment and discuss the situation with a doctor. Compression does not replace a vein duplex ultrasound and is not automatically appropriate for every type of swelling. Before selecting it, it is important to consider arterial status, skin characteristics, and the suspected cause of symptoms.

Can Varicose Veins Be Treated in Summer?

Yes, varicose veins can be treated in summer. The myth that treatment is not performed in summer is related to restrictions after certain procedures. The approach depends on the condition of the veins, examination results, lifestyle, and the ability to follow post-procedure recommendations.

The first step for bulging veins, swelling, or heaviness is an examination and vein duplex ultrasound. The examination helps assess blood flow direction, valve function, and the condition of the venous system. It is not possible to reliably determine which procedure is needed based on the appearance of the leg alone.

The following methods are used in my practice:

• EVLA with a Biolitec laser: endovenous laser treatment of a pathologically altered vein.
• Sclerotherapy, including micro-sclerotherapy and Echo-Foam sclerotherapy: injection of a sclerosant into a selected vessel.
• CLaCS: a combination of cryolaser and sclerotherapy for spider veins; the laser acts through the skin, while the sclerosant is injected into the feeding vein.
• Miniphlebectomy: removal of individual varicose tributaries through small punctures.
• Vein duplex ultrasound for diagnosis and follow-up.

CLaCS should not be confused with miniphlebectomy. With CLaCS, spider veins are not “removed through punctures”: the laser works through the skin, while the sclerosant acts on the feeding vein. Miniphlebectomy is used for other vascular changes and is performed through small punctures.

In summer, it is particularly important to protect the skin after sclerotherapy and CLaCS. Tanning may increase the risk of unwanted pigmentation in the treated area. Avoid direct sun exposure and tanning beds after the procedure. Follow the duration of restrictions determined by your doctor for your specific case. If you plan to wear open clothing or spend time in the sun, consider protection for the treated area in advance.

The hot season itself is not a contraindication to sclerotherapy, EVLA, or other methods. However, it is best to schedule the procedure for a period when you can follow the walking regimen, wear the prescribed compression garment, and protect your skin from the sun.

When Should You Not Blame Everything on the Heat?

Do not wait for improvement after a cool shower or a night's rest if:

• one leg has suddenly become noticeably larger than the other;
• swelling, pain, redness, or a local sensation of warmth is rapidly increasing;
• tenderness has developed along a vein and worsens with movement;
• shortness of breath, chest pain, difficulty breathing, pronounced weakness, or fainting has occurred.

These signs do not allow you to make a diagnosis on your own, but they require an in-person assessment. Sudden shortness of breath or chest pain requires emergency care, not a routine appointment.

Arrange a routine visit with a phlebologist if veins are gradually becoming more visible, swelling recurs in the evening, nighttime cramps interfere with sleep, or heaviness does not go away after rest. Diagnosis and treatment are determined after an examination and ultrasound, not from a photograph or advice from acquaintances.

In hot weather, the combination of overheating, dehydration, and immobility is especially harmful to the veins. Drink water while considering medical restrictions, move your feet and calves, take a cool shower, and rest lying down with your legs elevated. Choose compression based on appropriate indications. Varicose veins can be treated in summer. After sclerotherapy and CLaCS, protect your skin from the sun, and do not mistake dangerous symptoms for an ordinary reaction to the weather.

To book an appointment at M-Clinic, call +998 99 883-93-21. Treatment costs are calculated in a written estimate after a vein duplex ultrasound.

This article is for informational purposes only and does not replace a consultation with a qualified physician. If you are experiencing symptoms, please see a specialist.