This is a topic that is very controversial as each piercer has different ideas on what heals. Basically the skin needs time to form a tube of scar tissue around the piercing. If it is kept clean and free from dirt, germs and fluff then it will heal quickly and can be healed in roughly 2 to 6 weeks. Everyone is different.
Your own urine acts as an antiseptic to yourself and this piercing heals quite fast because of this. It is recommended having a squirt bottle of non-iodised salt water to rinse with instead of drying after going to the toilet. Squirt with salt water and then just gently pat.