Hi, HCG or human chorionic gonadotropin is a hormone that is used to induce ovulation and in the treatment of infertility in women. But, administration of HCG may cause hormonal changes in the body. The fluctuation in the hormone levels may cause blood vessels in the eye to rupture and develop redness as well as broken blood vessels. If they are not subsided within 2-3 weeks, then you should consult your doctor immediately for medical help. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Zubayer Alam, General And Family Physician