When members of the House of Representatives miss a vote, it is customary to provide a reason. ProPublica put together a database of these reasons, going back to 2007.
The reasons lawmakers cite most for missing votes range from the mundane (travel delays, often due to weather, or remaining in their districts for job fairs) to more personal (the birth of a child or a graduation ceremony or illness). Lawmakers have missed more than 2,000 votes for medical reasons, and thousands more for personal and family reasons.