Hello Doctor I used manforce staylong gel for couple of weeks and erroneously use to apply the gel on tip/head of my penis as I was not aware of the exact usage. Now since last 4-5 days I am feeling constant numbness in my penis head and also having erection problem. I Want to know if this numbness will remain permanently or would go away with time. I have completely stopped using the gel. Please provide your valuable guidance for further course of action.