Hello,
For the hair fall, causes could be due to seborrheic dermatitis which you already have, stress, fungal infections, alopecia aereata, hormonal imbalance (overproduction of dihydrotestosterone
and thyroid hormones irregularities),malnutrition,
telogen effluvium and sebum plugs on skin.
I would suggest you to consult a dermatologist and get these possibilities evaluated.