Thanks for your question on Healthcare Magic.
I can understand your concern. 
It is very common to have residual pain after 
thoracic surgery. 
This is because of 
nerve trapping. 
So no need to worry for death or anything serious. 
Tell your husband to follow these steps for better symptomatic relief. 
1. Apply warm water pad on affected areas of chest. 
2. Avoid movements causing pain. Avoid sudden jerky movements of chest.
3. Avoid forward bending.
4. Take simple painkiller like 
paracetamol or 
ibuprofen.
5. Divert mind from this pain, don't pay attention to it.
Don't worry, he will be alright with all these. 
Hope I have solved your query. I will be happy to help you further. Wishing good health to your husband. Thanks.