Could be Asteatotic Eczema(Xerotic eczema) with secondary infection due to constant scratching
Take an oral antibiotic like Droxyl(Cefadroxyl) 500mg twice daily for 7 days
Apply Tenovate-Gn cream twice daily.
Take tab Zyrtec
10mg once daily.
use moisturiser regularly on legs after the Cellulitis
and eczema resolve.
use mild soap like pears or dove.
use lukewarm water to bath