Iritis injection after the patient’s eyes congestion serious, may refer to subconjunctival injection of hormonal drugs, conjunctival congestion, may be a normal manifestation; may also be caused by infection, the need for cefoperazone and other active anti-infection treatment. Iritis need to take atropine and other pupil dilation, at the same time you can follow the doctor’s instructions to use tobramycin dexamethasone eye drops treatment, severe inflammation can be oral cortisone acetate or prednisone, or even dexamethasone subconjunctival injections to control inflammation. If the injection is dexamethasone and other hormonal drugs, the drug itself may lead to vasodilatation, causing the patient’s eyes to be congested, which may be a normal reaction to the drug and can be observed. However, after the subconjunctival injection, it is easy to cause secondary infections, such as bacterial infections, leading to severe congestion in the patient, the patient can follow the doctor’s instructions to use tobramycin eye drops and other drugs to control the infection. It is recommended that patients with iritis consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.