@jdotlim Oh that looks painful. Try to keep it dry it could lead to something worse. I try to wipe Fergus's chin and neck when ever I see him drink. Every night i wipe his chin and neck down with witch hazel pad. If I notice redness or bumps I will put some destin on the area helps to keep the area dry. You might also want to try Duoxo Pads (can buy thru Amazon) I dont use the duoxo pad every night only if I see a lot of pink or suspect yeast. I would also give him a bath and use a apple vinegar rinse it sounds weird but it really works. Leave the vinegar on do not rinse off let it soak in then towel dry him off after a few minutes.
Also make sure you are using stainless steel bowls and wash them once a day.
Hope he feels better soon Tonka is adorable.