Generally clinical diagnosis, may be assisted by ultrasound (above)
Ultrasound can aid in diagnosis - may see "cobblestoning" of subcutaneous fat due to accumulation of fluid in these tissues. Also helpful to evaluate for abscess.
Cellulitis
Folliculitis
Hand cellulitis
Wet gangrene
Facial cellulitis
Dry gangrene
Orbital cellulitis
Necrotizing cellulitis