Due to application of a depilatory cream, you might have developed an irritant reaction. To treat the same, apply a steroid antibiotic combination like mometasone fusidic acid
combination for few days. Do not lean the area with betadine
or savlon as it might irritate the skin more, instead clean it with lukewarm water. To relieve the itch you may take oral cetirizine
. Hope that answers your query. Take care.