Thank you for sharing your query on Healthcaremagic, I have carefully worked through your case the benzocaine is a recognized anesthetic use as a pain reliever, although these days it is being used in assisting a man last longer in bed, however there has been report that It is also known to cause allergic, irritation and some reactions such as itching, swelling, dizziness, lost sensitivity (numbness for few days ) and headache, the symptoms are more common in men who absorbs the chemical. I suggest do not use straight several days and wash really well after remove if you start experiencing some discomfort his use is not recommended Please kindly rate if my advise has been helpful Wishing you a good health Dr Tania Portelles-Driggs