A woman experienced an allergic reaction after dropping penicillin eye drops. Her symptoms included itching, burning skin, swollen lips and eyelids, wheezing cough, and decreased blood pressure. This reaction was caused by IgE and IgG antibodies. A cyst surgery patient later developed hemorrhagic syndrome due to activation of the fibrinolytic system. A 43-year-old patient presented with thrombocytopenia, reduced fibrinogen, blood coagulation abnormalities, petechiae, and septic shock, indicating disseminated intravascular coagulation (DIC) syndrome.