hi..Thanks for your Query!
To treat head lice
, you can apply 1% permethrin lotion on scalp
for half an hour and then wash off..Repeat the application after 10 days again.total two applications.
As for the hair loss occurring chronically,my suggestion to you would be to do a few blood tests to ascertain the cause before you treat any of the symptoms.
Hair Loss is a condition where multiple causes are there.It may be Familial,its may be telogen effluvium
, it may be some ordinary deficiencies ,but without doing a complete work up ,it it unwise to start any random medication.
Any treatment of hairless ,however,I would say is very long term and requires patience .There are also several newer therapies in Anti Hair Loss treatments, e.g. Mesotherapy etc , which help beyond medications.
Hope this helps..take care!