Efficacy of Inhaled Aromatherapy on Nausea and Vomiting in Hematological Malignancies

Inclusion Criteria: * Patients aged over 18 years, * Chemo-naive patients at inclusion, * Patients with haematological malignancies treated treated with chemotherapy, * Patients physically and mentally able to use the aromastick, * Patients who speak, read and write French, * Patients who have given signed consent, * Patients with social security cover. Exclusion Criteria: * Asthmatic patients. * Patients with anosmia. * Patients allergic to EO, lemon or ginger. * Patients who have already received aromatherapy to treat chemotherapy-induced nausea and vomiting, * Patients practising herbal medicine or acupuncture, * Pregnant and breast-feeding women, * Patients under guardianship, tutorship or curatorship, * Patients taking part in interventional studies involving antiemetic drugs or nutritional products, * Patients who have already had cancer.