fever blister

例句：

1. 1.She developed a fever blister on her arm after catching a cold.
   她感冒后手臂上起了一个热疹。
2. 2.The doctor prescribed an antihistamine to treat her itchy rash, which turned out to be a fever blister.
   医生开了抗组胺药来治疗她的痒疹，结果发现那是热疹。
3. 3. After the sunburn, she applied aloe vera gel to soothe the itchy and painful blisters.
   晒伤后，她用芦荟凝胶来缓解瘙痒和疼痛的水泡。