[nailertn]

if unit == "player" then
	self.PvP = self.Health:CreateTexture(nil, "OVERLAY")
	self.PvP:SetTexture("Interface\\Buttons\\WHITE8X8")
	self.PvP:SetVertexColor(1,0,0)
	self.PvP:SetHeight(18)
	self.PvP:SetWidth(18)
	self.PvP:SetPoint("BOTTOMLEFT", -13, -13)
end

If you want it on the target frame too leave the first line intact.