Vitex agnus-castus fruit is LIKELY SAFE for most people when taken by mouth appropriately. Uncommon side effects include upset stomach, nausea, itching, rash, headaches, acne, trouble sleeping, and weight gain. Some women notice a change in menstrual flow when they start taking vitex agnus-castus.
A foul-smelling infection or drainage from an abscess is diagnostic of anaerobic infection. This foul smell is produced by anaerobic bacteria and occurs in one third to one half of patients late in the infection. Other clues to anaerobic infection include tissue necrosis and gas production at the infection site.
If it's from an abdominal wound you could suspect injury to the bile ducts, liver or gallbladder. Otherwise yes there might be a potential infection. The bacteria often produce the blue-green pigment pyocyanin, a redox-active phenazine, ... Pseudomonas infections often have a characteristic sweet odor.