| 组别 | 患者数 | 红斑 | 瘙痒 | 灼热 | 疼痛 | 水疱 | 总计(%) |
| 观察组 | 30 | 1 | - | - | - | - | 3.3 |
| 对照组 | 30 | 1 | - | - | - | 1 | 6.7 |
| χ2 | - | - | - | - | - | - | 0.35 |
| P | - | - | - | - | - | - | 0.55 |