I have had thousands of cases just like hers over the years. I recommend the HUMAWORM Parasite Cleanse - this will kill them from the inside of the body ALONG WITH the RG's Medicated Cream - this will kill them externally.
Take the cream and use it full strength on the scalp. Apply as often as needed and only wash out once every 2-3 days. She can use a shower cap to cover her head during this time. This will kill them on the scalp and it will neutralize the toxins on her scalp too.
Once the bulk of the creatures are gone - she can dilute the cream with regular hair conditioner 1/2 medicated cream and 1/2 hair conditioner. Have her apply this once a day just before bed - sleep in the shower cap - and shampoo out the next morning. This will keep neutrilizing the toxins externally while the HUMAWORM is working internally.