Demodex mites are tiny organisms that commonly live in hair follicles and oil glands on human skin. They usually cause no trouble. When they overgrow around the eyelashes, though, they can contribute to itchy, irritated eyelids and a condition called Demodex blepharitis.
If your eyelids keep itching or collecting crust along the lashes, an eye exam can help identify the cause. Southwestern Eye Center provides eye care across Arizona and in select New Mexico communities. Schedule an eye exam to discuss recurring symptoms and your options for relief.
What Are Demodex Mites?
Demodex mites are microscopic relatives of spiders. You may hear them called face mites because they commonly live on facial skin, including around the eyebrows and eyelashes. They feed on material within follicles and glands, such as skin cells and oils.
Two species live on humans. Demodex folliculorum mainly lives in hair follicles, including eyelash follicles. Demodex brevis lives deeper within the oil glands, including glands along the eyelids. These glands help supply oil to your tear film.
Having mites does not automatically mean you need treatment. They are common residents of healthy skin, and many people never develop symptoms. The concern is whether mites are contributing to inflammation or other eye problems.
When Demodex Causes Eyelid Irritation
Demodex blepharitis is inflammation of the eyelids associated with Demodex mites. It can make the edges of your eyelids feel itchy, sore, or irritated. Recurring irritation warrants an exam, especially when your usual eyelid-care routine isn’t helping.
Common signs and symptoms include:
- Itching or burning along the eyelid edges
- Red, irritated eyelids
- Crusting or debris around the eyelashes
- A gritty feeling, as though something is in your eye
- Watery eyes or recurring discomfort
These symptoms can overlap with dry eye and other eyelid conditions. An exam helps distinguish the causes rather than relying on symptoms alone.
Age, rosacea, and a weakened immune system can influence the risk of Demodex-related problems. However, having mites does not mean your immune system is unhealthy. It also is not a reason to feel embarrassed about your hygiene.
How an Eye Doctor Checks for Demodex
Your eye doctor examines your eyelids and the bases of your eyelashes with a magnifying instrument called a slit lamp. One important clue is a collarette, a sleeve-like buildup that wraps around the base of an eyelash.
In some cases, a clinician may examine a lash sample under a microscope to look for mites.
Tell your doctor when symptoms started and which drops, cleansers, or eyelid products you have tried. A comprehensive eye exam can also look for other conditions contributing to your discomfort.
Treatment and Everyday Eyelid Care
Treatment depends on what your eye doctor finds. If Demodex blepharitis is the cause, care may include prescription treatment directed at the mites, along with an eyelid-care routine appropriate for your eyes.
Your care plan may also address dry eye, blocked oil glands, or other inflammation. Warm compresses and recommended eyelid cleansers may help with associated symptoms or debris, but they do not replace treatment directed at Demodex when it is needed.
Ask before trying a product around your eyes. Undiluted tea tree oil and other essential oils can irritate the eye area. Skin creams and household remedies are not substitutes for an eye-safe treatment plan.
Follow your prescribed routine and keep recommended follow-up appointments. Let your doctor know if symptoms continue or a product makes irritation worse.
Find Relief From Persistent Eyelid Irritation
If you are concerned about Demodex or recurring eyelid irritation, start with an eye exam. Southwestern Eye Center can evaluate your symptoms and recommend care based on the cause.
Schedule your eye exam or call (480) 854-8185. You can also find a Southwestern Eye Center location near you to review local appointment options.
Sudden vision changes or eye pain need prompt medical attention. Call (480) 854-8185 immediately during business hours. Seek emergency care if you cannot reach an eye doctor promptly; do not wait for a routine appointment.