Thanks for posting your query to HCM.
After reading your query I can make out three best possible diagnosis:
1. Belly button infection: Any kind of discharge from this area is almost always a sign of an infection. This might fungal infection
initially but later can be mixed infection. As this area is moist so there are high chances of fugal and bacterial proliferation. The open wounds caused by scratching are source for secondary bacterial infection and then yellowish or smelly discharge. Can be treated by proper oral treatment.
2. Urachal cyst: This is due to the fact that when we are in mother’s womb there is a duct above the bladder connected to the umbilical cord
which helps in developing fetus, and is closed before birth. When it is not closed later then birth a cyst develops from where urine or mucus leaks in form of discharge. The condition is rare, and it can be corrected surgically.
3. Sebaceous cyst: It is cyst formed due to collection of cheesy material inside it.
There is more of the possibility of first two as your discharge is clear and not cheesy or thick.
As you have applied all type of creams so it is the best thing to meet a surgeon to diagnose the either of the condition or at the best to rule out Urachal cyst
so that can be treated either simply by surgical method or with oral antibiotics
In between- kindly no self medications, no picking or scratching the belly button, wash the area with simple soap, and just clean the area with warm saline water and dry it completely with sterilized gauze multiple time of the day.
Hope to have provided the best information regarding your problem.
Dr Sanjay K Kanodia
MD (Dermatology & STD/Venereology)