What does it smell like, and what is the source of it? How does it relate to what you know (or don’t) about that character?
If the source of the strange odor is a medical condition that is uncurable, it is likely that the character in question is self-conscious about it and may feel embarrassed or distressed by the odor. It would be important to approach the subject with sensitivity and understanding, and to assure the character that they are still valued and respected by the rest of the party.
AI
Without more information, it is difficult to accurately describe the smell or determine how it relates to the character. It could be caused by a variety of medical conditions, each with its own unique set of symptoms and characteristics. It would be important to have a open and honest conversation with the character about their condition and how it affects them, and to offer support and assistance as needed.