Has anyone checked your Vitamin B12 levels lately? Should also request methylmalonic acid (MMA) levels and homocystien levels, as these indicate Vitamin B12 useage in the body and may be better indicators of tissue B12 status. Vitamin B12 deficiency can cause loss of all body hair (everywhere...not just on the scalp).
Also, hair loss tends to occur more easily when the body has been under severe stress (such as a significant Lyme Disease flare or herx), when protein intake or absorption is not adequate, and in the setting of silica or biotin deficiency (& probably other deficiencies contribute). Other conditions may also contribute/cause hair loss, such as skin infections where hair grows, or autoimmune conditions in which the connective tissue and/or skin is affected. Medications can also cause hair loss as a side-effect.
It might be good to talk with a dermatologist about this and see what s/he has to say. I hope this helps - take care,
Chronic Lyme Disease, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, Pancytopenia, chronic malabsorption/malnutrition, etc.; G-Tube; Currently TPN-dependent.
Meds: Zofran, Pulmicort, IV Ceftazidime, Heparin (to flush PICC line), Claritin, Colloidal Silver (used topically), probiotics, homeopathy.