You should have laser hair removal. Most hair removal lasers (I use the Light Sheer Duet- a diode laser) will not only remove hair but they treat ingrown hairs. Expect to be improved within the year.
Thank you for your question! This is not common. It may have been caused by the sweat glands being over stimulated with the treatment. This can be controlled with Botox. I recommend seeing an expert to have this evaluated. Best of Luck!