Which visa do I need for multiple entries to Thailand within three months?

The user is seeking advice on visa requirements for a return trip to Thailand after an initial visit. They plan to leave Thailand briefly and return within a short period. According to comments, as a Belgian citizen, the user can use the visa exemption for two consecutive entries, allowing for an initial stay of 45 days, which can be extended. However, they should be cautious about potentially being questioned by immigration if they perform back-to-back entries.