👉 Zosis is the condition where a person experiences sudden, severe pain or discomfort without any identifiable cause. It can be caused by various factors such as injury, infection, illness, or hormonal changes. Symptoms may include sharp pain, numbness, tingling, or weakness in one or both extremities. This condition is often accompanied by fever, vomiting, and a lack of appetite. Treatment typically involves analgesics or medications to manage the symptoms.