Hi, Amanda,
have you ever consider laser hair removal? it will end the problem entirely. Just make sure that you choose the clinic with the right laser machines as not all of them are effective. You are welcome to pop in for a free consultation about the ingrown hair - we are based in Central London tel 02072835800. Check out this link as well to get more info
http://www.bodysilk.co.uk/treatments/laser-hair-removal-londonGood luck!