Red eyes after waking up: When is it normal and when should you be concerned?

Waking up with red eyes is a common occurrence that can cause discomfort immediately after waking up. Often the redness goes away on its own during the day, but if it occurs with pain, discharge, or other symptoms, you should consult a doctor.

Many factors, from external influences in the bedroom to hidden systemic diseases, can contribute to the change in color of the whites of the eyes at night. It is important to distinguish ordinary irritation from symptoms that may indicate more serious health problems.

More serious symptoms can lead to permanent vision loss, so it is best to consult an eye specialist whenever you have a problem.

Serious symptoms are:

▪ Redness that does not go away with eye drops or within a few days
▪ Eye pain that is severe or lasts all day, or several days
▪ Discharge
▪ Sensitivity to light
▪ Changes in vision, such as blurred vision or loss of vision
▪ Other symptoms, such as fever, headache, nausea, or vomiting

Causes of waking up with red eyes

Allergies

The appearance of itching, swelling, and redness of the eyes, sometimes accompanied by a white, stringy discharge, usually indicates the presence of allergies. These symptoms result from the immune system's reaction to allergens such as:

▪ Dust mites
▪ Pet dander
▪ Ragweed
▪ Pollen
▪ Mold

I have had many patients complain of red eyes and allergies in the morning, and they would tell me that their pets had slept on their bed or pillow. When your eyes come into contact with allergens and you don't wash your face before bed, the risk of an inflammatory reaction increases, explains Dr. Imler.

Lack of sleep

Lack of sleep can decrease tear production and increase blood flow to the eyes, causing dryness and redness.

Redness from lack of sleep usually goes away with rest and moisturizing eye drops. Improvement occurs within a few hours or a day.

Eye strain and computer use syndrome

The more you look at screens, the less you blink. Blinking helps keep your eyes moist and protected. When this is lacking, your eyes become drier and redder.

The more time you spend in front of the devices, the more pronounced the symptoms become. Problems like dry eye don't go away immediately and can last into the next day, says Dr. Imler.

Sleep apnea and CPAP machines

CPAP machines are used to treat sleep apnea. Masks are placed over the nose or mouth to help breathing at night.

If the mask doesn't fit properly, air can seep into your eyes, drying them out and making them look red in the morning.

uveitis

Uveitis is inflammation of the middle layer of the eye and is associated with:

▪ Blurred or decreased vision
▪ Sensitivity to light
▪ Redness of the eyes
▪ Pain and irritation

Uveitis is a serious condition, as it can lead to permanent damage if left untreated.

Loose eyelid syndrome

This condition, more common in men and overweight people, is affected by your sleeping position. If you sleep with your face on the pillow, your eyelids can rub together at night.

If your eyelids are more elastic and irritated during sleep, you may wake up with red, puffy eyes, says Dr. Imler.

Entropion

As we age, the eyelid can turn inward, causing the eyelashes to rub against the eye. This causes discomfort, itching, and tearing.

Subconjunctival hemorrhage

This happens when a blood vessel in the white part of the eye bursts. It is usually not painful and goes away on its own.

You may wake up with part or all of your eye red. This often happens during coughing, sneezing, or physical exertion.

Acute angle-closure glaucoma

This condition causes redness, swelling, and severe pain, due to increased pressure in the eye.

High pressure can quickly lead to vision loss and is accompanied by headaches, nausea, and vomiting.

Rheumatoid arthritis

This autoimmune disease can also affect the eyes, causing inflammation.

Many diseases of the body also affect the eyes. Inflammation in the body can cause chronic redness, pain, and sensitivity to light, concludes Dr. Imler.