Hi. Thanks for your query. Read and understood your history which is very self-explanatory. Lifting of heavy weight has caused your belly button to have leakage which has formed a crusty pinkish fluid. Continued for a few days. Now your belly button area twinges every time you lift something heavy. All these things area suggestive of an umbilical granuloma which has ruptured due to pressure exerted on it. Since this is still there without any proper treatment the pain will persist. I would advise you the following: -First of all get a physical check up done by a General Surgeon to confirm the diagnosis. -Ultrasonography of the abdominal wall, umbilical area and abdomen to see if this thing has an extension as patent urachus or patent vitello-intestinal duct. Get relevant blood, urine and stool done for fitness. Get operated properly and take a post-operative care properly. You will be fine. In the meantime you can clean the area with liquid Povidone Iodine and use oral antibiotics and anti-inflammatory medicines.