I have recently cut my foot on an old, rusty boat engine (buried about 2 foot in mud). attempted to clean it, however, overnight the wound became black in colour. the wound is approximately 4 inches in length and increasingly becoming more painful

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.