TendSkin helps with ingrowns. For the best shaving experience, you should soak the area for 10 mins in warm water, use a shaving GEL (not foam or cream) and a new 3-4 blade razor. then shave against the grain.
I am the biggest proponent against 3-4 blade razors in the world I think. I think these are by far the worst razors on the planet if you have heavy hair growth. Sure they get closer, but they are also removing more layers of skin, and causing more ingrowns. I've found the best razor to be the sensor excel regardless of what area. Actually, my Braun Electric Shaver is a ALOT better than any razor I've ever owned. No not at getting close, but for minimizing irritation. If I shaved my chest, or shoulders with a mach 3 razor, I would not be able to shave again for about 3 weeks because of the irritation. With an electric, I can shave my face alot more often up to 5 times a week with electric while only 3 with the sensor excel and 2 with any mach 3 or 3 blade razor.