Hi Vanessa,
If he is receiving Cisplatin chemotherapy contact your oncologist immediately, especially if his symptoms are accompanied by ringing or buzzing.

If not then the problem he is having is fairly common. I had earaches and hearing loss temporarily as a result of mastoid fluid build up early in recovery. it eventually resolved iteslf and I am fine today. It was very much like having a bad cold and having your hearing "plugged up". The radiation damaged the eustachian tubes and it took a while for them to heal. He should be fine in about a month. They gave me a decongestant also with marginal results. You need to be watchful for secondary infections. If there is any elevation in temperature I would report this to the doctor.

I had the TV up pretty loud for a while also -maybe headphones are a temporary solution.

It'll get better.