Yes, you can swim—but not immediately after inserting a suppository. It’s best to wait at least 24 hours to allow the ingredients to fully melt and absorb. Ideally, time your swim just before your next suppository dose to avoid reducing the treatment’s effectiveness.
For example, if you're using BV Clear every 2 days (48 hours), swimming on the afternoon of the 3rd day (around hour 44) is a good option. You can then insert the next suppository shortly after your swim with no loss of effectiveness.
If you swim in a pool with heavily chlorinated water, you should not soak in the pool for too long, because the chlorine can kill your protective vaginal Lactobacillus. You can still swim, but keep it short and take a shower immediately to wash away the chlorine that soaked into your swimming suit. In case you stay in the pool for a long time, you should take a probiotic supplement right away to prevent BV and yeast due to the loss of protective vaginal Lactobacillus.
We also have an article about bathing, which applies the same principles as swimming. You may find it helpful: https://help.neueve.com/kb/how-to-use-the-product/i-love-bath-can-i-bath-when-i-am-using-neueve