Tetanus is commonly found in small openings and deep wounds, which are red, swollen, pus-filled, and painful to the touch. Since tetanus bacillus belongs to a kind of anaerobic bacteria, it grows and reproduces more rapidly in an anaerobic environment, so when the wound opening is small and the injury is deeper, there is less contact with oxygen, so most of the wounds infected with tetanus are characterized by small openings and deeper injuries. The most obvious symptom of tetanus after bacterial infection is the appearance of dark red, swollen wounds, and some wounds may have white or bloody pus. Because the wound infected with tetanus may damage the peripheral nerves, it usually leads to localized pain when the skin is touched. If you are infected with tetanus, you need to go to a regular medical institution in time for consultation and treatment under the guidance of a professional physician.