**1. Introduction**

One of the most devastating consequences of diabetes mellitus is Diabetic Foot Disease (DFD) which represents a significant global burden for individuals and healthcare systems. It includes osseous degeneration, ulceration, and infection of the diabetic person's foot [1]. These are associated with neurologic abnormalities, various degrees of peripheral arterial disease, and metabolic complications of diabetes in the lower limb [2]. The signs of diabetic foot are changes in skin tone, skin temperature, swelling of the foot or ankle, discomfort in the legs, open blisters on the feet that are difficult to heal or are draining, corns or calluses, dry skin fissures, particularly around the heel, and odd or persistent foot odors are all symptoms to observe [3].

Diabetic foot symptoms vary from person to person and can depend on the particular problem the person is suffering at that moment. Symptoms include loss of sensation, numbness and tingling, blisters and other painless injuries, skin irritation and temperature changes, red streaks, injuries with or without discharge, painful tingling, and stains on socks. However, a person may also experience some of the following symptoms such as fever, feeling very sick, chills, uncontrollable blood sugar, shaking, shock, redness [4].

The first published diabetes-specific classification system, the Meggitt-Wagner system, is a simple system consisting of only six grades (0–5, 0 means intact skin), the first three is related to depth [5]. It's actually easy to use and may explain its popularity despite known limitations. For the sake of explanation, Peripheral Arterial Disease (PAD) and Infectious Diseases are not considered individually for superficial lesions and there is no mention of neuropathy. PAD is considered gangrene only at a later stage. Therefore, in clinical practice, the score is most often 2 or 3. This means that it is not accurate enough to isolate most lesions. Although its inaccuracies appear to be inadequate for research protocols, a systematic review of continuous wound healing by the International Working Group on Diabetic Foot shows that large works Meggitts - Wagner grade indicates the classification the patient population. Some other scales are used these are University of Texas wound classification system (UT), SAD system, the wound ischemia and foot infection classification (WIFI).
