Common causes of lower eyelid congestion include contact dermatitis, blepharitis and conjunctivitis. 1. Contact dermatitis: If the patient is allergic, when the lower eyelid comes into contact with allergens, it is easy to trigger an allergic reaction, which stimulates the lower eyelid and leads to congestion, and some of the patients will also be accompanied by itchiness, eye redness and other discomforts. 2. Blepharitis: Blepharitis is an acute inflammatory reaction to the invasion of purulent bacteria into the glands of the eyelids. Under the stimulation of inflammation, the patient may experience redness, swelling, heat and pain in the eyelids, which can lead to congestion in the lower eyelids. 3. Conjunctivitis: If the patient’s conjunctival tissue is infected by bacteria and other germs leading to conjunctivitis, due to inflammation stimulation, the patient’s conjunctiva can be congested, edema, accompanied by an increase in secretion, but also cause the patient’s lower eyelid congestion of the discomfort of the symptoms. It is recommended that patients with obvious congestion of the lower eyelid should consult a doctor to evaluate their condition and follow the doctor’s instructions for treatment.