unable to pics ....
and you have to cure the fish where she is right now or it will increase her pain
how many fishes do you have ....
if its a 4 ft tank and it has more than 5 fishes in it desease removal will reduce to 10% evry fish increase
if rocks are less than 1 year old ...fish wont be able to cure it self
give fresh food to her ....30% chances of curign will increase
set timer for lights
or reduce lights
add 1 doctor wrasse
remove anemones if there are few
let the water be crystal clear for 3 days with unstabling the gravel
use plantonic food for angel as their skin needs it
check your tank if any elctric current is present
keep your tempreture to 26-27
turn off any reactore as they can be irritating to fish scales
she need to regain softness to her body and warm water for flexibility
and stable environment ....no rock movement or any additon of stock
firts job on cure=check phosphate,fungus,algae,nitrate
best cure would be add lots of hair marine plant or add chateomorpha
lot of algae+nitrate makes desease hard to control
best of luck