First, rest assured that head lice do not directly cause permanent hair loss; the shedding is likely due to scalp irritation from scratching or stress. To eliminate the lice, you can use over-the-counter lotions containing 1% permethrin, or consult a doctor for prescription treatments like ivermectin. Ensure you use a fine-toothed nit comb to remove eggs. For healthy hair growth, focus on soothing your scalp. Avoid harsh chemicals and excessive scratching. Once the infestation is cleared, your hair should naturally recover. If shedding persists, a dermatologist can evaluate if treatments like topical minoxidil or iron supplements are needed.