Brown pus coming out of cellulitis, do i need to see my doctor?

Yes: Brown pus is digested blood. You could be bleeding inside. You need confirmation and blood is also a rich medium for bacteria so the infection can flare up. Need adjustment of your antibiotics.

Brown cellulitis: Brown colored pus with cellulitis usually implies blood has been mixed in the wound. Red blood cells turn brownish in color once they begin to break down in a wound. You definitely need to see a physician or wound specialist and allow them to take a culture of the wound and prescribe for you an antibiotic.

Absolutely: With pus draining you must be evaluated by your physician which will culture the wound and start you on the right antibiotic.