Welcome to Health care magic.
1.The history mentioned about your husband - possible cause could be
lipoma ( fat content lesion) followed by
lymph node enlargement.
2.Suggest not to press or squeeze the lesion, it may complicate and not heal.
3.Its not a contaminated disease which you have to worry about, what you are experiencing could be lymph nodal enlargement.
4.Lymph nodal enlargement is seen in individuals with infections / inflammations, that can be localised or systemic - generalised.
5.So if you are aware of any problem treat it first and then the will go on its own.
6.For confirmation - an
ultrasound neck will help to know the nature if the lesion, where its coming from and where all its extending to. Good luck.
Hope it helps you. Wish you a good health.
Anything to ask ? do not hesitate. Thank you.