Thanks for your question on Healthcare Magic.
I can understand your concern.
The swelling you are talking about is mostly due to
costochondritis because it is tender on touch.
But better to get done
ultrasound examination of chest and local part to rule out other causes of swelling like
abscess, nodule, mass etc.
If ultrasound is normal then no need to worry much for this swelling.
Ask your husband to do following things for 1 week and swelling will subside.
1. Avoid movements causing pain.
2. Avoid bad postures in sleep.
3. Avoid heavyweight lifting and strenuous exercise.
4. Apply warm water pad on swelling area.
5. Take combination of painkiller and anti inflammatory drugs.
Hope I have solved your query. I will be happy to help you further. Wishing good health to your husband. Thanks.