What symptom may accompany fullness around the neck in subcutaneous emphysema patients?

The presence of fullness around the neck in patients with subcutaneous emphysema often correlates with changes in the voice, making voice change the correct answer. This occurs because the accumulation of air in the subcutaneous tissues can exert pressure on the structures of the neck, including the larynx and surrounding areas where the vocal cords are located. As the air pockets expand under the skin, they can lead to alterations in vocal cord function, resulting in a hoarse voice or difficulty speaking clearly.

The other symptoms listed, such as loss of appetite, coughing, and eye discomfort, may occur in various medical conditions but do not have a direct or specific relationship with the physical changes occurring in the neck due to subcutaneous emphysema. While coughing can be a symptom associated with respiratory issues, it is not a predominant feature linked specifically to the sensation of fullness around the neck in this context. Therefore, the voice change is the most relevant symptom to consider in relation to the condition of subcutaneous emphysema.