Are there risks associated with CPAP treatment for sleep apnoea? 

Continuous Positive Airway Pressure, commonly known as CPAP, is the primary treatment for moderate to severe sleep apnoea in the UK and is considered extremely safe for long term use. While the treatment is non-invasive and highly effective at maintaining an open airway, some users may experience minor side effects or technical challenges during the initial stages of therapy. Most of these risks are related to the fit of the equipment or the sensation of the air pressure and can be easily managed with support from a clinical sleep team. 

What We’ll Discuss in This Article 

• Common minor side effects such as nasal and throat dryness 

• Managing skin irritation and pressure sores from CPAP masks 

• The occurrence of aerophagia or swallowing air during treatment 

• Potential risks of respiratory infection from uncleaned equipment 

• The safety profile of long-term pressurized air therapy 

• How clinical monitoring helps mitigate treatment risks 

Common Side Effects and Minor Risks 

CPAP treatment is associated with a few minor side effects that usually occur as the body adjusts to the device. Obstructive sleep apnoea (OSA) is a relatively common condition where the walls of the throat relax and narrow during sleep, interrupting normal breathing. Because the machine delivers a constant stream of air, some users find that their nasal passages or throat become dry or irritated. This can lead to a blocked nose, runny nose, or even occasional nosebleeds if the air is too cold or dry. 

Another frequent but manageable risk is skin irritation. If a mask is too tight or not cleaned regularly, the silicone cushion can cause redness, rashes, or small sores on the bridge of the nose or the cheeks. Most of these issues are not medically dangerous but can cause discomfort that makes it harder to stick with the treatment. Using an integrated humidifier and ensuring a professional mask fitting are the most effective ways to reduce these common risks. 

Managing Equipment Related Challenges 

Some users may experience a sensation known as aerophagia, which involves swallowing air while using the CPAP machine. This can lead to feelings of bloating, gas, or stomach discomfort upon waking. While uncomfortable, aerophagia is generally harmless and can often be corrected by adjusting the air pressure settings or changing the sleeping position. It is important to discuss these symptoms with a respiratory technician rather than discontinuing treatment. 

The risk of respiratory infections is also a consideration for those using CPAP therapy. If the water chamber, tubing, or mask are not cleaned according to clinical guidelines, bacteria and mould can accumulate in the system. This can increase the likelihood of developing sinus infections or a cough. However, with regular maintenance and the use of distilled or cooled boiled water in the humidifier, the risk of infection remains very low. 

Comparing CPAP Risks and Management Strategies 

The following table outlines the most common risks associated with CPAP therapy and the standard clinical solutions used in the UK. 

Potential Risk	Common Symptoms	Management Strategy
Nasal Dryness	Blocked nose or dry throat.	Use of a heated humidifier and tubing.
Skin Irritation	Rashes or pressure marks.	Proper mask cleaning and size adjustment.
Aerophagia	Bloating or stomach gas.	Pressure setting review by a specialist.
Air Leaks	Dry eyes or noisy treatment.	Mask seal check or cushion replacement.
Infection Risk	Cough or sinus pain.	Daily and weekly equipment cleaning.

Long Term Safety and Clinical Oversight 

There is no evidence to suggest that long term use of CPAP causes damage to the lungs or the respiratory system. In fact, the medical risks of leaving sleep apnoea untreated, such as stroke or heart disease, far outweigh the minor risks of using the machine. NICE clinical guidelines recommend CPAP as the first line treatment for moderate or severe symptomatic OSAHS because the health benefits are significant and the safety profile is high. 

Patients in the UK are typically monitored by a multidisciplinary team who can track usage data and identify any issues early on. Regular clinical reviews ensure that the mask fit is still appropriate and that the air pressure remains at the optimal level for the patient’s needs. This continuous oversight makes CPAP one of the safest and most reliable medical treatments for respiratory health. 

Conclusion 

CPAP treatment for sleep apnoea is generally very safe, with most associated risks being minor side effects like dryness or skin irritation. These issues can usually be resolved through technical adjustments, such as using a humidifier or refitting the mask. While consistent equipment cleaning is necessary to prevent infection, the long term health benefits for the heart and brain make CPAP a vital intervention. If you experience severe, sudden, or worsening symptoms, call 999 immediately. 

Authority Snapshot (E-E-A-T Block) 

This article provides an evidence based overview of the risks and safety considerations of CPAP therapy to ensure the public has accurate health information. It was written by the MyPatientAdvice Medical Content Team and reviewed by Dr. Stefan Petrov, a UK-trained physician with extensive experience in general medicine, surgery, and emergency care. All content is strictly aligned with current NHS and NICE clinical guidance to ensure medical safety and accuracy.