Can Air Conditioning Make You Sick? Summer Colds, Sore Throat and Fever in Barcelona

Introduction

In June, Barcelona begins to alternate between warm streets and cool indoor spaces. Tourists may move from the sun to a taxi, from a terrace to a hotel room, or from a crowded street to a restaurant with strong air conditioning.

Many visitors notice sore throat, nasal congestion, cough, headache or a general feeling of being unwell after several days of these temperature changes. This often leads to the question: can air conditioning make you sick?

Air conditioning itself does not usually cause infection, but it can contribute to irritation, dryness and discomfort. It can also make symptoms more noticeable when a virus, allergy or respiratory sensitivity is already present.

How air conditioning affects the body

Cold, dry air can irritate the throat, nose and eyes. When the air is very dry, the protective lining of the respiratory tract may become less comfortable, making people feel scratchy, congested or hoarse.

Sudden changes from outdoor heat to cold indoor spaces can also stress the body. The contrast may trigger headaches, muscle tension or a feeling of fatigue, especially after a long day of walking and sun exposure.

In hotels, offices or shared spaces, air conditioning may circulate air in closed environments. If ventilation is poor or filters are not well maintained, some people may experience more allergy-like or respiratory symptoms.

Air conditioning, viruses and summer colds

A summer cold is usually caused by a virus, not by cold air alone. However, travel increases exposure to people in airports, planes, hotels, restaurants, events and public transport. This makes viral infections more likely.

Air conditioning may worsen the sensation of throat pain, cough or congestion, but the underlying cause can still be a virus. Fever, body aches, persistent cough, thick mucus or worsening symptoms may suggest more than simple irritation.

Tourists should avoid assuming that all symptoms are caused by air conditioning, especially if they feel progressively worse or have respiratory symptoms that interfere with sleep, walking or daily plans.

When symptoms may be allergies or irritation

Not all congestion or sore throat is infectious. In Barcelona, pollen, pollution, dust, hotel environments and changes in humidity can also trigger symptoms.

Allergy-related symptoms often include sneezing, watery eyes, nasal itching and congestion without fever. Irritation from dry air may cause a scratchy throat, dry cough or discomfort that improves when the person leaves the cold environment.

A medical consultation can help distinguish between irritation, allergy, viral infection or another condition, especially when symptoms persist or the patient has asthma or other respiratory problems.

How to reduce discomfort during your stay

Simple measures can make a significant difference. Avoid setting the hotel room too cold, especially at night. A moderate temperature is usually better tolerated than a very cold room.

Drinking water regularly, avoiding direct airflow to the face or throat, and keeping the room ventilated when possible can help reduce dryness. People with allergies may also benefit from limiting dust exposure and washing their face after spending time outdoors.

If symptoms appear, rest, hydration and avoiding extreme temperature changes can help. However, persistent fever, shortness of breath, chest pain, wheezing or symptoms lasting several days deserve medical attention.

When to consult a doctor in Barcelona

Medical advice is recommended if sore throat is severe, if fever appears, if cough worsens, if breathing becomes difficult, or if symptoms do not improve after a few days.

Tourists with asthma, chronic lung disease, immune problems or recent surgery should be more cautious. A doctor can evaluate whether treatment, testing or medication is needed.

For international visitors, an English-speaking doctor in Barcelona can provide a clear diagnosis and practical guidance without language barriers.

Final thoughts

Air conditioning is useful during Barcelona’s warm months, but strong temperature changes and dry air can irritate the body. Sometimes symptoms are mild and temporary, but they can also be linked to infection, allergy or an underlying condition.

If you feel unwell during your stay and symptoms persist or worsen, a medical consultation can help you recover and continue your trip safely.

About the author

Dr. Stefan Botnar, MD - English-Speaking Doctor in Barcelona for Tourists and Expats

Dr. Stefan Botnar is a board-certified English-speaking doctor in Barcelona with over 15 years of experience in internal medicine and public health. He provides fast, out-of-pocket consultations for international patients, specialising in preventive care, metabolic health, travel-related issues, and personalised medical support.

His clinic, located at Carrer de la Marina, 16-18, Torre Mapfre, Barcelona, offers in-person and telemedicine appointments, nutritional guidance, diagnostic testing and minor emergency care. Dr. Botnar speaks English, Spanish, Russian, Romanian and German.

Disclaimer

This article is for informational purposes only and is not a substitute for professional medical advice. Always consult a healthcare provider if you experience persistent or worsening symptoms.