A saddle sore is basically a pimple. You could use benzoyle peroxide or similar. I wouldn’t lance it or you could get an infection. The more you ride on it the harder and more sore it will get or it may pop. I recommend taking a few days off and do some other exercise and let it heal. Make sure to clean & dry your shorts well. Put chamois cream and shower or clean area immediately after your ride. Don’t hang out in wet shorts if you can. I’ve been using these products. Also used Assos and Chamois Buttr Euro.
Doc’s Skin Care Saddle Sore Ointment
https://www.amazon.com/Docs-Skin-Care-Saddle-Ointment/dp/B004DNLKTU/ref=sr_1_3?ie=UTF8&qid=1484753667&sr=8-3&keywords=saddle+sore
Doc’s All Natural Chamois Cream
https://www.amazon.com/Docs-All-Natural-Chamois-Cream/dp/B004DF4WR0/ref=pd_bxgy_468_2?_encoding=UTF8&psc=1&refRID=EBCVQYXS9J02RYH96ARC