bellybuttons like other areas of your skin surface are very subject to skin infections. tenderness and redness are signs of infection so you will need to clean this area carefully with an antibacterial solultion use a topical antibacterial ointment and cream and see if it improves. in it does not you will need to see your medical provider for a proper examination and treatment.
my bellybutton is tender and sore and slightly red in color. what is this from"? and what could be causing the soreness?