it appears to be seborrhoeic dermatitis
or contact dermatitis
as you are willing to send a pic that will definitely help to rule out a few things.
in the mean time what i can suggest is that you apply white petrolatum jelly as frequently as possible. this helps to soothen and heal the raw skin.
along with it a mild to mid potent steroid
with antibiotic combination for a short period should do the work, since you complain of watering.
when the skin is sensitive it tends to burn with everything and petrolatum being bland will be a better alternative in this case
if you need further help please send a pic