What is the cause of redness, swelling and pain in the lower eyelid of the eye?

Redness, swelling and pain in the lower eyelids are often associated with diseases such as granuloma, blepharitis and lacrimal cystitis, the specifics of which need to be clarified after timely medical examination.
1. Staphylococcus aureus is an inflammatory disease caused by purulent bacteria such as Staphylococcus aureus that infects the eyelid glands. Common clinical manifestations include redness, swelling, heat and pain in the eyelids, which may be accompanied by tearing. In severe cases, there may be chills, fever and other systemic infectious symptoms.
2. Blepharitis is an inflammatory disease that occurs in the skin of the eyelid margin, eyelash follicles and their glands. It is often caused by abnormal secretion of the sebaceous glands at the margin of the eyelid, pathogenic infections and nutritional deficiencies. Typical symptoms are itchy eyes, eyelid margin congestion and eyelid margin sebum overflow, which may be accompanied by inverted eyelashes, eyelash loss and ulcers.
2. Dacryocystitis refers to a kind of localized infectious dacryocystitis which is often caused by bacterial infection due to the narrowing or obstruction of nasolacrimal duct. Typical clinical manifestations are tearing, stinging, congestion and redness of the eye, which may be accompanied by purulent exudate, fever and chills.
If you find redness, swelling and pain in the lower eyelid, you should immediately go to the nearest hospital for examination and treatment, and should not take any unauthorized treatment to avoid delaying the progress of the disease. Pay attention to eye hygiene, reasonable diet, quit smoking and drinking, and avoid overwork.