Aww sabar ya mama, 4 bulan ni memang common time untuk fussiness naik sebab baby mulai aware dengan surroundings dan dia getting overstimulated easily, especially kalau toys banyak sangat, dia overwhelm je. Daytime fussiness dengan short naps tu biasa jugak sebab development leap, tapi since your little one pun ada eczema, make sure dia comfortable je, sometimes itchiness tu boleh bikin cranky even kalau mild. Best you check dengan pediatrician to rule out anything else (reflux, hunger cues yang berubah, or anything else lah), sebab mama yang kenal baby terbaik, kalau instinct ada, better safe to confirm. For the travel, maybe reduce stimulation, dim lights, less toys, familiar blanket or white noise bisa tolong dia settle better. You're doing great worrying about this, okay?