A case of a 9 year old boy suffering from allergic asthma is analysed in detail. The child had family problems because he was considered lazy and weak. The seaside aggravated his asthma and he had had mononucleosis. Repertorisation indicated Aqua marina, which caused an aggravation of swelling of the cervical glands and a high temperature. This was allowed to run its course and after 2 days the boy recovered fully, with great improvement in his asthma since then.