Sleep Apnea Surgery Risks and Complications: What Should You Know Before Surgery?

Sleep apnea surgery can improve obstructive sleep apnea in appropriately selected patients, but every operation has potential risks. The important thing to understand is that there is no single risk profile for “sleep apnea surgery.”

A tonsillectomy or palate operation has very different possible complications from jaw advancement surgery or implantation of a hypoglossal nerve stimulator. Some effects—such as pain, swelling, difficulty swallowing, or temporary numbness—may be expected during recovery. Other complications, such as significant bleeding, infection, airway problems, or persistent nerve symptoms, require closer medical attention.

There is also another important risk that patients sometimes overlook: the operation may improve obstructive sleep apnea without completely eliminating it. Understanding both the surgical risks and the possibility of residual sleep apnea is essential before deciding whether surgery is appropriate.

For an overview of the different procedures used to treat airway obstruction, see our guide to sleep apnea surgery.

Are Sleep Apnea Surgeries Generally Safe?

Many sleep apnea procedures are performed safely in appropriately selected patients, but the level of risk depends on the operation and the patient's health. Factors that can influence surgical risk include:

• Severity of obstructive sleep apnea
• Body weight
• Heart or lung disease
• Diabetes and other medical conditions
• Smoking
• Medications, particularly medicines that affect bleeding
• The number of airway procedures performed
• The type and duration of anesthesia

Expected Recovery Symptoms vs Surgical Complications

Not everything uncomfortable after surgery means something has gone wrong.

General Risks of Sleep Apnea Surgery

Because most sleep apnea operations involve anesthesia and surgical incisions, they share some general surgical risks. These can include:

• Bleeding
• Infection
• Reactions to anesthesia or medicines
• Blood clots
• Pain
• Swelling
• Delayed healing

Why Does Sleep Apnea Itself Matter During Recovery?

There is an unusual feature of sleep apnea surgery: the condition being treated can also influence perioperative risk. Adults with obstructive sleep apnea already have a tendency for their upper airway to narrow during sleep. After surgery, factors such as:

• Anesthesia
• Sedative medicines
• Opioid pain medicines
• Postoperative swelling

can further affect breathing.

Risks of UPPP and Palatal Surgery

Uvulopalatopharyngoplasty (UPPP) and related palate procedures modify tissues around the soft palate and throat to increase airway space. Because this area is involved in swallowing and speech, complications can differ from those of other sleep apnea operations.

Pain

Throat pain can be significant after UPPP and may continue for several weeks. Pain can make swallowing uncomfortable, which is why adequate hydration and appropriate pain management are important during recovery.

Bleeding

Postoperative bleeding is an important complication of throat surgery. Bleeding may occur shortly after surgery or during the healing period. Significant bleeding from the mouth or throat requires prompt medical assessment.

Difficulty Swallowing

Swallowing may feel uncomfortable or different while the throat heals. Most temporary swallowing difficulties improve, but persistent swallowing problems need assessment.

Liquids Coming Through the Nose

One distinctive potential complication is velopharyngeal insufficiency. The soft palate normally helps separate the nose from the mouth during swallowing and speech. If this mechanism does not close adequately after palatal surgery, liquid can occasionally pass upward toward the nose when drinking. This is often temporary but can rarely persist.

Speech or Voice Changes

Because UPPP alters tissues involved in resonance and speech, some patients notice changes in how their voice sounds. Persistent speech changes are less common but should be discussed before surgery, particularly for people whose profession depends heavily on their voice.

Risks of Adult Tonsillectomy for Sleep Apnea

Removing enlarged tonsils can be highly useful when they are a major cause of airway obstruction, but adult tonsillectomy has its own recovery challenges. Common concerns include:

• Significant throat pain
• Difficulty eating and drinking
• Dehydration
• Postoperative bleeding

Bleeding deserves particular attention because it can sometimes occur several days after surgery rather than immediately. Patients should therefore follow their surgeon's recovery instructions even when they initially feel that healing is progressing well.

Risks of Tongue-Base Surgery

Tongue-base procedures are used when tissue behind the tongue contributes substantially to airway obstruction. Depending on the technique, possible complications can include:

• Tongue or throat swelling
• Bleeding
• Pain
• Temporary difficulty swallowing
• Altered tongue sensation
• Temporary changes in tongue movement

Swelling is particularly important because the tongue and surrounding tissues form part of the upper airway. Appropriate postoperative observation may therefore be needed after more extensive tongue-base procedures.

Maxillomandibular Advancement Surgery Risks

Maxillomandibular advancement (MMA) moves the upper and lower jaws forward to enlarge the airway behind the palate and tongue. It can produce substantial improvement in OSA, but it is also considerably more extensive than most soft-tissue procedures.

Facial Swelling

Significant swelling of the cheeks, lips, and jaw area is expected during the early recovery period.

Lower Lip and Chin Numbness

This is one of the most important complications to discuss before MMA. Nerves supplying sensation to the lower lip and chin travel through the lower jaw and can be affected when the bone is repositioned. Temporary numbness is common. For many patients sensation improves over time, but some degree of altered sensation can persist for a prolonged period or remain permanent.

Dental and Bite Changes

Because the jaws are physically repositioned, the teeth and bite need to be carefully planned. Possible problems can include an imperfect bite or the need for additional orthodontic or dental management.

Hardware Problems

Plates and screws are generally used to stabilise the repositioned jaws. Some patients later require removal of hardware because of infection, discomfort, exposure, or other problems.

Other Possible Risks

As with other jaw operations, complications can also include:

• Bleeding
• Infection
• Delayed bone healing
• Jaw-joint symptoms
• Need for additional surgery

Hypoglossal Nerve Stimulation Risks

Hypoglossal nerve stimulation involves implanting an electronic device that stimulates the nerve controlling tongue movement during sleep. Because it is both an operation and a long-term implanted-device treatment, there are two categories of risk.

Risks From Implant Surgery

Possible surgical effects include:

• Pain
• Swelling
• Infection
• Temporary tongue weakness
• Discomfort around the implant
• Scarring

Risks After the Device Is Activated

Stimulation-related effects can include:

• Uncomfortable stimulation
• Tongue soreness
• Tongue abrasion from movement against the teeth
• Dry mouth
• Mechanical discomfort from the implanted components

Can the Device Need Another Operation?

Yes. An implanted system may occasionally need:

• Repositioning
• Lead revision
• Component replacement
• Battery replacement
• Complete removal

Nasal Surgery Risks

Nasal surgery may involve septoplasty, turbinate reduction, nasal-valve treatment, or a combination of procedures.Potential complications vary according to the operation but can include:

• Bleeding
• Infection
• Temporary congestion and crusting
• Persistent nasal blockage
• Changes in nasal sensation

Another important limitation is that nasal surgery may improve airflow without completely correcting OSA if the major airway collapse occurs farther down in the throat. In that situation, the operation may still help make CPAP easier to use, but the patient may continue to require sleep apnea treatment.

One of the Biggest Risks: Residual Sleep Apnea

The complication patients often focus on least is actually one of the most clinically important: The operation may not eliminate the sleep apnea. A procedure can:

• Reduce snoring
• Improve daytime sleepiness
• Lower the apnea-hypopnea index
• Improve oxygen levels

while still leaving enough airway obstruction to require further treatment.

Can Sleep Apnea Return Years After Surgery?

Yes. An initially successful result may change over time. Possible contributors include:

• Weight gain
• Age-related changes in airway tissues
• Progressive collapse at another level of the airway
• Incomplete correction of the original obstruction

Long-term follow-up remains important, especially if snoring, witnessed breathing pauses, daytime sleepiness, or other symptoms return.

Why Is a Postoperative Sleep Study Important?

A follow-up sleep study helps determine how much OSA remains after healing. It can assess:

• Apnea-hypopnea index
• Remaining breathing interruptions
• Nighttime oxygen levels
• Overall severity of residual OSA

The result may show that no additional active treatment is required—or that CPAP, an oral appliance, another surgical procedure, or another treatment remains necessary. Patients should therefore not automatically stop CPAP simply because surgery has been completed or snoring has improved.

Who May Have a Higher Risk of Complications?

Risk is individual, but the surgical team may need to take extra precautions when a patient has factors such as:

• Severe OSA
• Significant obesity
• Heart or lung disease
• Bleeding disorders
• Poorly controlled diabetes
• Smoking
• Medicines that affect blood clotting
• Previous complex airway surgery

How Can Surgical Risk Be Reduced?

Some complications cannot be completely prevented, but careful preparation can reduce avoidable risk. Before surgery:

• Make sure the surgeon has reviewed the sleep study
• Provide a complete medication and supplement list
• Tell the surgical team about heart, lung, bleeding, or other medical conditions
• Follow instructions about medicines that affect clotting
• Stop smoking when advised
• Discuss how OSA will be monitored after anesthesia

After surgery:

• Take medicines exactly as prescribed
• Follow diet and activity restrictions
• Maintain adequate hydration
• Attend postoperative appointments
• Continue sleep apnea treatment unless your medical team specifically changes it
• Complete postoperative sleep testing when recommended

When Should You Seek Urgent Help After Sleep Apnea Surgery?

Instructions vary by operation, so always follow the discharge advice given by your surgeon. However, urgent medical assessment is particularly important for symptoms such as:

• Difficulty breathing or rapidly worsening airway swelling
• Significant or persistent bleeding from the mouth, throat, nose, or surgical wound
• Inability to take enough fluids because of severe swallowing difficulty
• Increasing redness, swelling, drainage, or other signs of infection around an incision or implant
• Any rapidly worsening symptom that was not expected in the postoperative plan

How Do Risks Differ Between Common Sleep Apnea Surgeries?

Should Fear of Complications Stop You From Having Surgery?

Not automatically. The decision should compare the likely benefit of treating OSA with the risks of the proposed procedure and the risks of leaving significant OSA inadequately treated.

For someone with a clear anatomical obstruction who cannot tolerate effective non-surgical treatment, the potential benefit may justify surgery. For another person with a low predicted surgical response or a procedure carrying substantial risk relative to its expected benefit, another treatment may be preferable.

This is why informed consent should include not only a list of complications but also:

• Expected chance of meaningful improvement
• Chance that OSA will remain
• Recovery time
• Possible long-term effects
• Available alternatives

The Bottom Line

Sleep apnea surgery carries risks, but those risks differ significantly according to the procedure. Palatal and tonsil surgery can involve pain, bleeding, swallowing problems, dehydration, and occasionally changes in speech or palatal function.

Maxillomandibular advancement involves a larger recovery and commonly causes temporary lower facial numbness, with some patients experiencing persistent altered sensation. Hypoglossal nerve stimulation introduces both surgical risks and long-term device-related issues such as tongue discomfort, stimulation problems, infection, and the possibility of future revision or replacement.

OSA itself also makes postoperative respiratory management important because anesthesia, sedatives, opioid pain medicines, and swelling can affect breathing. And one of the most important possible outcomes is not a surgical complication in the traditional sense: significant sleep apnea may remain even after a technically successful operation.

So before surgery, the most useful question is not simply: “Is sleep apnea surgery dangerous?” It is: “What are the specific risks of the operation being recommended to me, how likely are they in my situation, and how does that risk compare with the expected benefit?”