Case: 30-year-old Ms. Cheng three months ago found that both eyes itchy, each attack can not help but scratch the eyelids, each time a scratch, but also very easy to fall off the eyelashes, intolerable. For three months, Ms. Cheng had been to the ophthalmology department of the major hospitals, the doctor diagnosed her with common conjunctivitis, prescribed some medications to treat conjunctivitis, but the effect is not good, three months, she used almost all the medications to treat conjunctivitis, however, the itchy eyes are still plagued by the symptoms of the day and night. The doctor found that Ms. Cheng’s eyelashes were stained with a lot of wax-like secretions, wrapped around the roots of the eyelashes like a cuff, which is not a symptom of ordinary conjunctivitis, so the doctor plucked a few of Ms. Cheng’s eyelashes and took them under the microscope, and found that several helminths mites were slowly crawling along the eyelashes, which is exactly the cause of the itching of her eyes — helminth mite infection. This is the cause of her itchy eyes – a helminth mite infection. This is what you see under the microscope: What is a helminth mite? Hello, I’m a helminth mite, a member of the mite family, and my favorite place to be is in people’s eyelashes and skin, especially the elderly, and I can be found in the eyelashes of almost everyone over the age of 70. I have two types, follicle mites and sebaceous mites, follicle mites like to hide in the root of the eyelashes, about 0.3-0.4mm long, infected patients often have symptoms such as loss of eyelashes, eyelash scales, so the above Ms. Cheng infected with this kind of helminth mites, and sebaceous mites are mainly in sebaceous glands and blepharoplakic glands, about 0.2-0.3mm, the eye mainly manifested as blepharoplakic dysfunction. What will happen if I get helminth mites? When the number of parasitic helminth mites reaches a certain number, it may cause helminth mite-infected blepharitis, which manifests itself in symptoms such as itching, redness of the eyes, foreign body sensation, stinging, photophobia, tearing, etc. The eyelashes are often covered with a lot of scales, and are also prone to falling out of the eyelashes. In all types of blepharitis, the detection rate of helminth mites is as high as 20.76% to 50.69%, therefore, it is one of the most common causes of blepharitis. If you have recurring symptoms of eye redness and itchiness, and there is no other reason, you have to be alert to helminth mite infection. What kind of people are susceptible to infection with helminth mites? 1, the elderly group 2, the immune deficiency crowd 3, rosacea and seborrheic dermatitis crowd Current research has found that the susceptible population of helminth mites includes the elderly group, the immune deficiency crowd, patients with rosacea or seborrheic dermatitis, wearing contact lenses and other people, for the frequently recurring chalazion patients, should also be vigilant about the possibility of infection by helminth mites. Then, if there is redness in the eyes, itchy eyes and other symptoms, in addition to helminth mites, there may be allergic conjunctivitis, dry eye and other diseases, but also need to go to the ophthalmology hospital in time, for professional diagnosis and treatment.