Suggest Remedy For Head Lice

Dear Dr, I have had intense itching for five months. I saw a dermatologist the first month of itching and she recommended useing Baby Shampoo. Last night, I realized that I had head lice. It has now been treated. My deliema is that I am schelduled for an excisional biopsy in two days of the Right I nguinal node. I have swollen cervical, anterior cervical nodes and shotty axillary nodes (with swelling tenderness and inflamation). I also had a sudden 20lb weight loss in a 2 week period a year and a half ago. My appetite has not returned. I also have occasional night sweats. My question is, Do you think the cervical node swelling is R/T the 5 month lice problem? Can the 5 month lice infestation cause axillary and inguinal node enlargement? Also, do you think I should go through with the excisional biopsy? Any information and direction you can provide would be greatly appreciated. K.