Travelling to Phuket with a very young child is entirely doable with some extra planning around logistics — this page sticks to practical arrangements rather than medical advice, which is best sought from your own paediatrician before travel.
Flights
Most airlines accept infants from a few weeks old, with bassinet seating available on longer flights by request — worth booking bulkhead or bassinet-eligible seats as early as possible, since these are limited and allocated on request rather than automatically.
Accommodation
Cribs and baby cots are available on request at most mid-range and above hotels — confirm directly rather than assuming, and ask about connecting or larger rooms if travelling with additional luggage for a baby's needs. See our family resorts guide for properties built around younger children specifically.
Supplies
Formula, diapers and baby food are widely available at supermarkets and pharmacies in tourist areas — no need to over-pack supplies for the whole trip, though bringing familiar brands for the first day or two smooths the adjustment if your baby is used to a specific product.
Heat and sun
Phuket's heat and strong sun call for extra shade, hydration and sun protection for a young child — a beach umbrella or tent and loose, breathable clothing are more useful here than anywhere temperate.
Getting around
Car seats are not standard in Thai taxis — bringing a portable travel car seat or specifically booking a private transfer company that provides one is worth arranging in advance rather than assuming standard taxis will have one available.