A wound is a rapid onset of injury that involves lacerated or punctured skin (an open wound), or a contusion (a closed wound) from blunt force trauma or compression. In pathology, a wound is an acute injury that damages the epidermis of the skin. Classification
According to level of contamination, a wound can be classified as:

Clean wound – made under sterile conditions where there are no organisms present, and the skin is likely to heal without complications. Contaminated wound – usually resulting from accidental injury; there are pathogenic organisms and foreign bodies in the wound. Infected wound – the wound has pathogenic organisms present and multiplying, exhibiting clinical signs of infection (yellow appearance, soreness, redness, oozing pus). Colonized wound – a chronic situation, containing pathogenic organisms, difficult to heal (e.g. bedsore). Open
Open wounds can be classified according to the object that caused the wound:

Incisions or incised wounds – caused by a clean, sharp-edged object such as a knife, razor, or glass splinter. Lacerations – irregular tear-like wounds caused by some blunt trauma. Lacerations and incisions may appear linear (regular) or stellate (irregular). The term laceration is commonly misused in reference to incisions. Abrasions (grazes) – superficial wounds in which the topmost layer of the skin (the epidermis) is scraped off. Abrasions are often caused by a sliding fall onto a rough surface such as asphalt, tree bark or concrete. Avulsions – injuries in which a body structure is forcibly detached from its normal point of insertion.
Given the abnormalities of the microvasculature and other side effects of diabetes, these wounds take a long time to heal and require a specialized treatment approach for proper healing. As many as 75% of diabetic patients will eventually develop foot ulcers, and recurrence within five years is 70%. If not aggressively treated, these wounds can lead to amputations. It is estimated that every 30 seconds a lower limb is amputated somewhere in the world because of a diabetic wound. Amputation often triggers a downward spiral of declining quality of life, frequently leading to disability and death. In fact, only about one third of diabetic amputees will live more than five years, a survival rate equivalent to that of many cancers. Many of these lower extremity amputations can be prevented through an interdisciplinary approach to treatment involving a variety of advanced therapies and techniques, such as debridement, hyperbaric oxygen treatment therapy, dressing selection, special shoes, and patient education. When wounds persist, a specialized approach is required for healing. Pathophysiology
To heal a wound, the body undertakes a series of actions collectively known as the wound healing process. Diagnosis
A wound may be recorded for follow-up and observing progress of healing with different techniques which include:
Photographs, with subsequent area quantification using computer processing
Wound tracings on acetate sheets
Kundin wound gauge

Management
The overall treatment depends on the type, cause, and depth of the wound, and whether other structures beyond the skin (dermis) are involved. Treatment of recent lacerations involves examining, cleaning, and closing the wound.