What is the best way to do a border run from Chiang Mai if I can't fly?

The user is seeking alternatives to flying for a border run from Chiang Mai due to being denied boarding on a flight for medical reasons. Comments suggest various methods, including taking a bus to Chiang Khong, going to Laos, using different airlines, and obtaining a medical certificate for visa extensions. Suggestions also mention the convenience of traveling to Laos and using various transport methods like buses and boats.