Thanks for query on HCM.
Pus,blood and bad smell in the belly button is caused by a bacterial infection. A
navel infection can produce pus as well as a clear discharge, bleeding,
redness, and inflammation.
It usually occurs after bad hygiene,tight clothing.
Take proper local care,clean it with antiseptic soap or liquid,make it dry properly and start to apply antibiotic cream like
fusidic acid.
Take oral antibiotic like amoxy/clavulinic to subside bacterial infection and
nsaid to subside pain,swelling,inflammation.
If it is recurrent then go for investigations like cbc,fbs,ppbs,pus c/s to rule out underlying condition and proper medical management.
Get examined by your family physician for proper diagnosis and medical management.