I had hifu treatment done 10 days ago (face and neck) since then i've been having headache. Is it normal?

Short answer - no, this is not normal. Please consult your Specialist Ultherapy physician. The cause is more than likely neuropraxia at this time frame- temporary damage to your nerves. If you had your forehead treated, a sensory nerve such as the supraorbital or supratrochlear nerve may have been hit. This may result in pain- a full history, examination and review of the treated area must be conducted before treatment. All the best, Dr Isobel Walker. Fiori Institute. Brisbane. Australia.