What can I do about this spitting suture? (Photo)

It does appear that you have an exposed suture from the picture.  Keep it clean as you are doing and have your PS remove it.  

Continue doing what you are doing by keeping the area clean and dry until you can see your surgeon. Be sure to call them. These issues heal quickly once addressed so your surgeon may want to see you soon for a short visit.

Thank you for your question and photograph.  My advice is to keep the area clean and dry and follow-up with your plastic surgeon as planned.  A spitting stitch is common and will likely heal very well on it's own.  Best of luck.

Thank you for your question.Your surgeon needs to take care of this. Give him or her a call so you can be seen. Best wishes.

The deep stitch needs to be removed. I would contact your Surgeon and let them know what is going on so they can see you sooner to remove the stitch.