Swollen and itchy eyes may be caused by bacterial conjunctivitis, allergic conjunctivitis, acute dacryoadenitis, etc. Depending on the cause of the disease, it can be treated with topical use of ofloxacin drops, tobramycin drops, or systemic application of penicillin, amoxicillin and other drugs. 1. Bacterial conjunctivitis: caused by bacterial infection, can cause redness, swelling, heat and pain in the eye, accompanied by itching. Tobramycin, azithromycin or ofloxacin eye drops can be used topically, or penicillin or ceftriaxone can be applied systemically. 2. Allergic conjunctivitis: itching, eyelid edema and swelling occur after contact with allergic substances, should be kept away from allergens, while the topical use of anti-allergic eye drops such as Patanol, azelastine eye drops. If the symptoms are severe, you can also take loratadine tablets to relieve allergic symptoms. 3. Acute dacryoadenitis: mainly manifested as redness, swelling and pain on the outer side of the upper eyelid, you can choose to take oral amoxicillin, cefixime and other antibiotics to treat, but also can be used topically levofloxacin eye drops or tobramycin eye drops. Swollen and itchy eyes should go to the hospital in a timely manner to improve the examination and give targeted treatment after clarifying the cause of the disease.