Table 4.

Classification according to criteria for defining signs and symptom regeneration time.

Classification		Criterion
		Clinical	Anatomical	Treatment
MSD Type	Onset Mode	Signs and Symptoms	Injury Zone	Rest	Rehabilitation
0	Late	Mild pain, which worsens with movement, self-resolving for up to 48 h.	Ligaments/tendons Muscles	No need	No need
1	Sudden	Severe pain at the time of injury, progressive, disabling or not, remaining for days. Muscular contracture, pain on intense palpation, sometimes diffuse, local oedema, hyperaemia, presence of hematoma, pain on movement, decreased range of motion.	Ligaments/tendons Joints Muscles, Bones	Need	Need
2	Sudden	Acute, constant inflammatory pain worsens with movement, temporarily incapacitating and may remain for days to weeks. During palpation or free movement, moderate to severe pain may or may not have oedema and haematoma, decreased range of motion due to fear.	Ligaments/tendons Joints Muscles Bones	Need	Need
3	Gradual	Chronic inflammatory pain, of moderate to low intensity, with constant loss of function. Present during tasks, requiring the use of daily medication to control pain. It can worsen with task movement and decrease at rest, often related to paraesthesia.	Ligaments/tendons Joints Muscles Bones Nerves	Need	Need