Is it problematic to quickly reenter Thailand from Laos after a short visit?

The ability to reenter Thailand after a brief visit to Laos primarily depends on the discretion of the immigration officer. While it is not inherently problematic to reenter so quickly, previous entries and the method of entry (land vs. air) may influence their decision. If you've already used your allowed land border crossings for the year, you might face issues, but staying overnight in Laos does not significantly change your situation.