Brother doesn't want to get married

Few days back my brother who is engaged had hijama done, at first only water oozed out and then slowly the dirty blood, the doctor said he had effects of jadoo as there was not much blood in his body and he lay cold and sweating after hijama. Moreover he used to pray very rarely before the hijama but now he is praying regulary alhamdulillah. But now he is against getting married. Please advice as to what we should do.