What do you suggest if i have headlice but i cannot find them?

Look for nits.: How do you know you have head lice if you don't see them? An itchy scalp can be the only symptom. Sometimes there is a rash at the nape of the neck. Sometimes you can see the nits (eggs),especially at the base of your hairs. You should contact your doctor for further diagnosis and treatment. They may recommend you use the one of the over-the-counter preparations available.