The causes of dry and itchy inside of lower eyelids are blepharitis, allergy, herpes simplex blepharitis, improper eye habits, etc. 1. Blepharitis: blepharitis is caused by staphylococcus aureus infection, oval dermatophyte infection, vitamin B2 deficiency, etc., which can produce dry and itchy symptoms at the onset. For this case, the causative agent should be removed, and antibiotic eye ointment can be applied locally for treatment, such as erythromycin ophthalmic ointment. 2. Allergy: When the lower eyelids come into contact with allergens such as drugs, chemicals and dander, it may lead to allergy, which is prone to dry and itchy symptoms. In the face of this problem, antihistamines such as oral loratadine and cetirizine can be taken to relieve the adverse symptoms. 3. Herpes simplex blepharodermatitis: Herpes simplex blepharodermatitis can occur in the lower eyelids and may cause dry and itchy symptoms, which is mainly caused by the stimulation of herpes simplex virus. It is recommended to use topical acyclovir, ganciclovir and other antiviral eye ointment or eye drops for treatment to avoid the disease from affecting your life for a long time. 4. Improper eye habits: If you play with your cell phone or computer in a dim environment for a long time, or use your eyes excessively, it is easy to fatigue your eyes, and symptoms of dryness and itching inside the lower eyelids will appear. In order to avoid damage to the eyes, you should develop good eye habits. All of the above medications should be used in accordance with medical advice. It is recommended that patients with persistent symptoms not relieved, go to the hospital as soon as possible, to clarify the cause of the disease, under the guidance of the doctor treatment.