After treatment, how soon can I can go on holiday abroad? We do not advise that you fly long haul (over 4 hours) for 4 weeks following any treatment. Short haul flights (less than 4 hours) are fine. You will have to wear a support stocking for a week following any treatment. Therefore, you cannot swim for a week, and we do not advise that you horse ride, but apart from that you can carry on as normal.