This study will test whether inhaling essential oils can change how sensitive people with migraine are to pressure pain. Participants will be allocated to inhale lavender, peppermint, a combination of both, or a control solution (distilled water with coconut oil). Each group will have 50 participants. The inhalation will last 15 minutes and will happen only once. Before and after the inhalation, we will measure how much pressure on certain areas of the head.

This is a parallel, randomized, placebo-controlled clinical trial to evaluate pain thresholds before and after the inhalation of essential oils or a control, in patients of both genders diagnosed with migraine. There will be three experimental groups, each with 50 participants (lavender, peppermint, and a combination of lavender and peppermint) and one control group with 50 participants (distilled water with coconut oil). The intervention will be conducted in a single session lasting 15 minutes, and participants will be evaluated before and immediately after the inhalation of the essential oils or control by measuring their pain thresholds in the following cephalic regions: occipital, masseter, temporal, vertex, and frontal. The randomization sequence will be generated by a statistician using the R software. The resulting randomization list will be stored in a sealed envelope and handled by an assistant evaluator who will not take part in the intervention. Participants will be allocated according to the random sequence based on their order of arrival.

Inclusion Criteria:

• Adults aged 18-65 years
• Diagnosis of episodic or chronic migraine according to the Internactional Classification of Headache Disorders (ICDH-3)
• History of migraine for at least 1 year
• Ability to understand and provide informed consent
• Participants currently using or not using migraine preventive medication

Exclusion Criteria:

• Severe acute circulatory disorders
• Diabetes melitus
• Uncontrolled arterial hypertension
• Fribromyagia
• Anosmia or hyposmia
• Known allergy or hypersensitivity to essential oils or their components
• Pregnancy or breastfeeding

Non-identifiable and non-sensitive individual participant data will be shared for academic and scientific purposes. The data will be available after the study is completed, for an indefinite period, through a virtual platform. The following will be shared: study design, statistical analysis plan, and consolidated research results. Access will be granted to interested researchers upon formal request, exclusively for secondary analyses, systematic reviews, or meta-analyses, with a commitment to ethical and academic use.

The data will be available after the study is completed

Access will be granted to interested researchers upon formal request