Is my navel piercing infected?

I just found this list of ways to tell if your piercing is infected.

Quote

How do I know if my piercing is infected?

1. Do you see a dark discharge? Is your piercing painfully swollen? Is it warm to the touch? This could indicate bacteria or another irritant has caused an infection or a response from you body that resembles an infection.
2. Is there a solid marble-like bump underneath your skin? Is it warm to the touch? Is it painfully swollen? Do you see dark discharge? This could indicate an abscess. An abscess is a trapped infection underneath the skin, which could potentially burst. Don't squeeze it and don't remove your body jewellery. See a doctor immediately, as this could develop into a bigger complication.
3. Is there a bump next to the piercing, similar to a pimple? Is it tender and swollen? Do you see pus? This could indicate a blocked pore or follicle in or near the piercing. This is nothing to worry about and regular hot compress care should treat it easily.
4. Is your piercing itchy? Is the skin tender, tight and shiny? Is there a rash? This could indicate a reaction to the metal or any chemicals you may be using on the piercing. Simply change your body jewellery to a different metal (Titanium, Blackline and Zircon Gold recommended) and do not use any cleaning agents on the piercing. Saline Solution can and should be used.
5. Is there a dark, shiny lump forming at the entry hole of your piercing? Does the lump remain a small size without growing? This could indicate hypertrophic scarring. This is fairly common and will subside in most cases. Continue with your aftercare regime, avoiding irritation to the area.
6. Is there a growing dark lump of skin forming around the entry hole of your piercing? Is the piercing tender or inflamed? Is the lump increasing in size? Is the area itchy? This could indicate a keloid. Keloids are raised, reddish nodules that grow above the surface of the skin and form large mounds of scar tissue. Keloids cannot be treated and will require surgical removal (although this is not always successful). You will need to see your doctor for advice.