Hi , 
Thanks for the query. 
I completely understand your concern and I hope I am able to help you for the same. 
Looks like you have developed cellulitis over the umbilical region. 
We can try conservative treatment first but if the condition continues to worsen , then you might need to consult a physician. 
Avoid touching it too much. 
Avoid using any kind of 
cold dreams or oils, as it might increase the lesion .
You can start using any topical antibiotic/antiseptic cream(like 
mupirocin cream) over the lesion for 2-3 days .
Take some pain killers along for relieving the associated pain and discomfort. 
Oral antibiotics are required if the cellulitis increases, which a 
dermatologist can examine and suggest .
Take care, 
Wishing you speedy recovery, 
Dr Geetika Paul 
MD ( Dermatology)