Hello
Redness with yellow looking wound could usually mean an infection. It will be extremely difficult for me to tell you exactly without examining you. There are also a few questions I would like to ask you, whether you got hurt at the same place recently? Did you take a Tetanus shot the last time your were hurt?
Next Steps
I would advice you to see a General Surgeon who may examine your wound and tell you if you have an infection in the tissue or skin infection. If needed, he may clean the wound n apply antiseptic cream. You may also be started on antibiotics. Please do not start or stop any medications without consulting a doctor.
Health Tips
Keep the wound area clean and dry. Clean the wound with antiseptic solution and allow it to dry.