Hello, I understand your concern. I am Dr. Arun Tank, infectious diseases specialist, answering your query. In my opinion it should be infection. Because horrible smell from the suture site is the indication of infection always. I advice you to do Gram s staining, culture and sensitivity from the wound discharge. It gives you idea about the possible pathogen and its sensitivity. Taking drug according to report treats infections. You can also applys ointment of antibiotics sensitive to the organisms locally. Please maintain hygiene as it can clears the infection equally as do antibiotics do. Suture sites are the potential infection prone site wearing a cotton garments can also help healing the infection. Please do dressing with diluted dettol and betadine. I will be happy to answer your further concern, you can ask me on bit.ly/DrArun. Thank you. Dr Arun Tank Infectious diseases specialist.