Prurigo nodularis is a skin condition characterized by hard crusty lumps that itch intensely.  The exact cause of the condition is unknown. However, it can occur in isolation or as a result of repeated trauma to chronic pruritus (itching). Treatment for the condition can be challenging.
What is (are) Prurigo nodularis ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What is (are) Prurigo nodularis ? [/INST] \n Prurigo nodularis is a skin condition characterized by hard crusty lumps that itch intensely.  The exact cause of the condition is unknown. However, it can occur in isolation or as a result of repeated trauma to chronic pruritus (itching). Treatment for the condition can be challenging.</s>