Hollow sound when rubbing upper chest/lower throat

[eyooh]

After my recent gyne surgery (couple of days ago) i now hear a hollow sound when i rub or tap my finger on my upper chest/lower throat.

What is this? Is it just because theres so little fat there compared to everywhere else? please


Edit: added a picture

[Dr. Elliot Jacobs]

It is possible that there is an air bubble trapped under the skin.  Don't worry, the air will absorb within a few days or less.

Dr Jacobs