A simples remedies are from forest and drug store.

As in any skin damage applies compresses of chopped blueberry, or boiled chopped mass apply in gauze as every day.

Edema with,allergy, rashes use Kräuterrhofi  gel  in aches,as cools, of eucalyptus, menthol, camphor and anti microbe.
http://www.fishpond.co.nz/Health/KrauterhoF-Ice-massage-gel-spearmint-menthol-camphor-100ml-Anti-flu/9999918772963
 As wash skin, apply a compress of oregano infusion.

In eczema drink before meal for three times-day a glass of birch juice, till three weeks, as eating vegetables, milk meal, as juice apply compress on allergy skin, rashes,skin damages.