Many infections can be painful. Pain is often a key symptom of infection. According to the provided reference, pain can arise from:
- Somatic tissue invasion: For example, septic arthritis.
- Visceral tissue invasion: For example, appendicitis.
- Nerve injury: For example, acute herpes zoster neuritis.
- The accompanying inflammatory process.
Therefore, infections such as septic arthritis, appendicitis, and acute herpes zoster neuritis are examples of painful infections. The pain is related to tissue invasion or nerve injury and inflammation.
