A system for assessing pain in a subject, comprising: a data receiver, configured to receive pain data indicative of pain in the subject; a processor circuit, configured to: generate a plurality of pain descriptors using the pain data, the plurality of pain descriptors indicative of two or more of pain intensity, spatial extent of pain, or temporal pattern of pain; and produce a composite pain score using the plurality of the pain descriptors, the composite pain score quantifying overall pain; wherein the processor circuit comprises an image processing circuit configured to: produce a pixelated pain representation using the received pain data, including pixelating a patient pain drawing into a plurality of pixels corresponding to anatomical point locations of the subject, each of the plurality of pixels associated with respective pain descriptors indicating one or more of presence, intensity, or temporal pattern of pain at the corresponding pixel; and group the pixels into one or more pain areas, each of the pain areas comprising pixels with respective pain descriptors meeting a specified criterion; and the system comprising an output unit configured to produce a presentation of information about the pain in the subject including the composite pain score. a data receiver, configured to receive pain data indicative of pain in the subject; a processor circuit, configured to: generate a plurality of pain descriptors using the pain data, the plurality of pain descriptors indicative of two or more of pain intensity, spatial extent of pain, or temporal pattern of pain; and produce a composite pain score using the plurality of the pain descriptors, the composite pain score quantifying overall pain; wherein the processor circuit comprises an image processing circuit configured to: produce a pixelated pain representation using the received pain data, including pixelating a patient pain drawing into a plurality of pixels corresponding to anatomical point locations of the subject, each of the plurality of pixels associated with respective pain descriptors indicating one or more of presence, intensity, or temporal pattern of pain at the corresponding pixel; and group the pixels into one or more pain areas, each of the pain areas comprising pixels with respective pain descriptors meeting a specified criterion; and the system comprising an output unit configured to produce a presentation of information about the pain in the subject including the composite pain score. generate a plurality of pain descriptors using the pain data, the plurality of pain descriptors indicative of two or more of pain intensity, spatial extent of pain, or temporal pattern of pain; and produce a composite pain score using the plurality of the pain descriptors, the composite pain score quantifying overall pain; wherein the processor circuit comprises an image processing circuit configured to: produce a pixelated pain representation using the received pain data, including pixelating a patient pain drawing into a plurality of pixels corresponding to anatomical point locations of the subject, each of the plurality of pixels associated with respective pain descriptors indicating one or more of presence, intensity, or temporal pattern of pain at the corresponding pixel; and group the pixels into one or more pain areas, each of the pain areas comprising pixels with respective pain descriptors meeting a specified criterion; and the system comprising an output unit configured to produce a presentation of information about the pain in the subject including the composite pain score. produce a pixelated pain representation using the received pain data, including pixelating a patient pain drawing into a plurality of pixels corresponding to anatomical point locations of the subject, each of the plurality of pixels associated with respective pain descriptors indicating one or more of presence, intensity, or temporal pattern of pain at the corresponding pixel; and group the pixels into one or more pain areas, each of the pain areas comprising pixels with respective pain descriptors meeting a specified criterion; and the system comprising an output unit configured to produce a presentation of information about the pain in the subject including the composite pain score.