Congestion in the fundus of the eye generally means that there is congestion underneath the eye, and the cause needs to be identified before it can be treated. Conjunctivitis can be treated with antibiotics such as levofloxacin eye drops. Those caused by scleritis need to be treated with hormonal medications such as prednisolone acetate eye drops. The lower part of the eye is often referred to as the fundus, and congestion here is usually caused by conjunctivitis or scleritis. Conjunctivitis is an inflammation of the conjunctival tissue caused by pathogenic microorganisms in the external environment, mainly due to poor eye hygiene, etc. Bacterial infections can be treated with antibiotic drops, commonly used are levofloxacin hydrochloride eye drops and tobramycin eye drops, etc. Scleritis, on the other hand, is usually caused by the presence of blood in the lower part of the eyeball, which is often referred to as the fundus of the eye. Scleritis, on the other hand, is usually caused by autoimmune reaction, and can be treated with hormonal drugs to suppress the immune reaction to eliminate the symptoms, commonly used are tobramycin dexamethasone eye drops, prednisolone acetate eye drops and so on. If the congestion under the eye is not relieved for a long time or accompanied by other discomforts, it is recommended to consult a doctor as soon as possible to check and deal with the medication should be used under the guidance of a doctor, do not self-medication.