Periorbital Cellulitis: Symptoms, Causes and Treatment

Written by Medicover Team and Medically Reviewed by Dr Vompolu Kamakshi Bhaskar , Ophthalmologists

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Periorbital cellulitis, also known as preseptal cellulitis, is a bacterial infection of the eyelid and surrounding skin and soft tissues. It occurs in the tissues in front of the orbital septum and does not involve the eye socket itself. Although it is generally less serious than orbital cellulitis, prompt diagnosis and treatment are important because the infection can spread to deeper tissues and cause serious complications.

Periorbital cellulitis can occur at any age but is particularly common in children. It may develop after an injury or insect bite around the eye or from the spread of a nearby infection, such as sinusitis. Early medical evaluation helps distinguish it from orbital cellulitis and ensures appropriate treatment.

What Is the Difference Between Periorbital and Orbital Cellulitis?

Periorbital and orbital cellulitis are different infections affecting tissues around the eye. Periorbital cellulitis occurs in front of the orbital septum, while orbital cellulitis involves tissues within the eye socket. Orbital cellulitis is more serious and can threaten vision or spread to the brain.

Location: Periorbital cellulitis affects the eyelid and tissues in front of the orbital septum, whereas orbital cellulitis affects tissues within the orbit.
Eye movement: Normal eye movement is generally preserved in uncomplicated periorbital cellulitis; pain or restriction with eye movement is concerning for orbital cellulitis.
Vision: Vision is usually unaffected in periorbital cellulitis, while orbital cellulitis may cause blurred or reduced vision.
Eye position: Bulging of the eye, known as proptosis, is more characteristic of orbital cellulitis.
Severity: Orbital cellulitis has a greater risk of abscess formation, vision loss, and intracranial complications and requires urgent treatment.

Because the two conditions can sometimes be difficult to distinguish, symptoms such as severe eye pain, painful or restricted eye movements, double vision, reduced vision, or eye bulging require immediate medical evaluation.

What Are the Symptoms of Periorbital Cellulitis?

Periorbital cellulitis usually causes inflammation around one eye. Symptoms may develop over a short period and can range from mild eyelid swelling to more pronounced redness and tenderness.

Eyelid swelling: Swelling may affect the upper or lower eyelid and can sometimes make it difficult to open the eye.
Redness: The skin around the affected eye may become red or discolored.
Pain and tenderness: The eyelid and surrounding skin may be painful or tender to touch.
Warmth: The affected skin may feel warmer than the surrounding area because of inflammation.
Fever: Fever may occur, particularly when the infection is more extensive.
General feeling of illness: Some people may experience fatigue or malaise along with the local infection.
Difficulty opening the eye: Significant eyelid swelling may partially or completely cover the eye.

Unlike orbital cellulitis, uncomplicated periorbital cellulitis usually does not cause pain with eye movement, restricted eye movements, bulging of the eye, or vision loss. The development of these symptoms requires urgent medical assessment because they may indicate orbital involvement.

What Are the Causes of Periorbital Cellulitis?

Periorbital cellulitis occurs when bacteria infect the skin and soft tissues surrounding the eye. The infection may enter through a break in the skin or spread from a nearby infection.

Common causes and sources of infection include:

Local skin injury: Cuts, scratches, abrasions, or other breaks in the skin around the eye can allow bacteria to enter.
Insect bites: A bite near the eyelid can damage the skin and provide an entry point for bacteria.
Sinus infections: Infection in the nearby sinuses, particularly the ethmoid sinuses, can spread to tissues around the eye.
Upper respiratory infections: Respiratory infections may sometimes precede periorbital cellulitis, particularly in children.
Nearby skin infections: Infections such as impetigo or infected wounds around the face may spread to the eyelid tissues.
Eye or facial procedures: Although uncommon, infection can occur after procedures or surgery involving tissues around the eye.

Common bacteria associated with periorbital cellulitis include Staphylococcus aureus, streptococcal species, and, in some cases, Haemophilus influenzae. The organisms involved can vary according to age, vaccination status, local resistance patterns, and the source of infection.

When Should You See a Doctor for Periorbital Cellulitis?

Seek an ophthalmologist's medical attention if you develop redness, swelling, warmth, or pain around the eye, particularly when these symptoms develop suddenly or are accompanied by fever. Early treatment can prevent the infection from spreading.

Redness or swelling of the eyelid or skin around the eye
Pain or tenderness around the affected eye
Fever or a general feeling of illness
Rapidly worsening swelling or redness

Get medical help immediately if:

Pain occurs with eye movement or the eye becomes difficult to move
You develop blurred or double vision or any reduction in vision
The eye appears to bulge or change position
There is severe headache, vomiting, confusion, or other neurological symptoms
There is rapidly increasing swelling, severe pain, or a high fever

These symptoms may indicate orbital cellulitis or another serious complication requiring urgent assessment and treatment.

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How Is Periorbital Cellulitis Diagnosed?

Periorbital cellulitis is usually diagnosed through a medical history and physical examination. The healthcare provider evaluates the eyelid and surrounding tissues while checking eye movement, vision, and other features that could indicate orbital involvement.

Medical history: The healthcare provider asks about the onset of symptoms, recent injuries or insect bites, sinus infections, respiratory infections, previous eye problems, and other relevant conditions.
Physical examination: The eyelids and surrounding skin are examined for redness, swelling, warmth, tenderness, and possible wounds or sources of infection.
Eye examination: Vision, pupil responses, eye movements, and the position of the eye may be assessed to look for signs of orbital involvement.
Blood tests: A complete blood count and other inflammatory markers may be considered in patients with systemic symptoms or more severe infection.
Imaging: CT or MRI of the orbits and sinuses may be required when orbital cellulitis is suspected, the examination is difficult, symptoms are severe, or the patient does not improve with treatment.
Microbiological testing: Cultures may be obtained from drainage or another suspected source of infection when clinically appropriate to help guide antibiotic treatment.

Prompt diagnosis is important because distinguishing periorbital cellulitis from orbital cellulitis determines the urgency and type of treatment required.

What Are the Treatment Options for Periorbital Cellulitis?

Treatment of periorbital cellulitis focuses on eliminating the bacterial infection and preventing its spread into the orbit or other surrounding tissues. The choice of treatment depends on the patient's age, severity of infection, underlying conditions, and risk of complications.

Antibiotic Therapy

Antibiotics are the main treatment for bacterial periorbital cellulitis. Mild cases may be treated with oral antibiotics when the patient is otherwise well and orbital involvement has been excluded.

Oral antibiotics: Commonly selected agents may include amoxicillin-clavulanate or another antibiotic appropriate for the suspected organisms and local resistance patterns.
MRSA coverage: Additional coverage may be considered when methicillin-resistant Staphylococcus aureus is suspected based on local epidemiology or individual risk factors.
Intravenous antibiotics: Hospital-based intravenous treatment may be necessary for severe infections, significant systemic illness, very young or high-risk patients, or cases where oral treatment is unsuitable.
Culture-directed treatment: Antibiotics may be adjusted when microbiological testing identifies a specific organism and its antibiotic susceptibility.

Hospital Treatment

Hospital admission may be recommended when there is concern about orbital involvement, severe infection, systemic illness, rapid progression, or inadequate response to outpatient treatment. Patients can then receive intravenous antibiotics and close monitoring of vision and eye function.

Surgical Treatment

Surgery is not usually required for uncomplicated periorbital cellulitis. However, drainage may be necessary if an abscess develops or if imaging shows a collection that requires intervention. If orbital cellulitis or a deeper infection is present, an ophthalmologist or other specialist may recommend surgical drainage depending on the clinical situation.

Supportive Care

Pain and fever control: Appropriate pain-relieving or fever-reducing medicines may help relieve discomfort.
Hydration: Maintaining adequate fluid intake supports recovery.
Treatment of the underlying source: Associated sinusitis, skin infections, or other sources should be evaluated and treated when necessary.
Follow-up: Clinical reassessment is important to ensure that symptoms are improving and that orbital involvement has not developed.

Antibiotics should be taken exactly as prescribed. If symptoms worsen or fail to improve after starting treatment, prompt reassessment is necessary.

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What Are the Risk Factors for Periorbital Cellulitis?

Certain conditions and circumstances can increase the likelihood of developing periorbital cellulitis. Children are particularly susceptible because infections of the upper respiratory tract and sinuses are common during childhood.

Young age: Children, particularly younger children, have a higher risk of developing periorbital infections.
Sinusitis: Infection of the sinuses can spread to the tissues surrounding the eye.
Recent facial trauma: Cuts, scratches, insect bites, or other injuries near the eye can allow bacteria to enter.
Existing skin infection: Bacterial infections of the face or eyelid can spread into surrounding tissues.
Weakened immune system: Certain illnesses or immunosuppressive medicines can make it harder for the body to fight infection.
Incomplete vaccination: Lack of recommended vaccination can increase susceptibility to infections caused by organisms such as Haemophilus influenzae type b.

What Are the Complications of Periorbital Cellulitis?

Most cases of periorbital cellulitis respond well to appropriate treatment. However, delayed or inadequate treatment can allow the infection to spread to deeper tissues and cause serious complications.

Orbital cellulitis: Infection may spread behind the orbital septum and involve the tissues within the eye socket.
Orbital abscess: A collection of pus may develop within or around the orbit and may require surgical drainage.
Vision loss: Severe orbital infection can damage the optic nerve or other structures responsible for vision.
Cavernous sinus thrombosis: In rare cases, infection can spread to the cavernous sinus and cause a potentially life-threatening blood clot.
Meningitis: Infection can rarely spread to the protective membranes surrounding the brain and spinal cord.
Sepsis: A severe infection can enter the bloodstream and trigger a potentially life-threatening systemic response.

Rapid recognition and appropriate antibiotic treatment substantially reduce the likelihood of these complications.

How Can Periorbital Cellulitis Be Prevented?

Not every case of periorbital cellulitis can be prevented, but several measures can reduce the risk of infection and its complications.

Maintain good hygiene: Wash hands regularly and avoid touching or rubbing the eyes with unclean hands.
Care for injuries promptly: Clean cuts, scratches, and insect bites around the eye appropriately and monitor them for signs of infection.
Treat nearby infections: Seek medical care for significant sinus, skin, or facial infections to reduce the risk of spread.
Keep vaccinations up to date: Recommended childhood vaccinations, including those against Hib and pneumococcal disease, help reduce infections associated with periorbital cellulitis.
Avoid sharing personal items: Do not share towels, cosmetics, or other items that may transfer bacteria.
Seek prompt care for worsening symptoms: Early assessment of eye-area infections can help prevent progression to deeper infection.

Frequently Asked Questions

1. What causes periorbital cellulitis?

Periorbital cellulitis is caused by bacteria entering the skin through cuts, insect bites, or sinus infections, often involving Staphylococcus or Streptococcus.