I'm glad you went to ER @anilu to get things check out and for peace of mind. Infection while on chemotherapy is nothing to be "brave" about and tough it out. Better to check.

I might also suggest telling the oncology nurse about this symptom at his next chemo appointment and to ask what to do if it happens again. Is it normal and to be expected with every treatment?

Ani, may I ask what type of lung cancer your husband has? I'd like to connect you with other members with the same cancer.