Altitude sickness is very rare below 2,500m (8,202 feet), almost non-existent without any hard slog. Mild symptoms of altitude sickness can be experienced by both males and females of any age group as the elevation goes higher. Surprisingly, even though the altitude in Bhutan is on the higher side than most people are accustomed to, you hardly get to hear about altitude sickness, unless you are doing a high-altitude trek. Most of the valleys in Bhutan are under 8,202 feet and even the mountain passes are only a bit above 3,000m (9,842 feet).
As far are worrying about altitude sickness in Bhutan is concerned, it is to be kept in mind that even a young healthy athlete can suffer from the heights. It is always wise to travel in accordance with the advice from your Bhutan guides. Your arrival in Paro and then moving on to Thimphu would be good days for you to start acclimatization. Remember everybody is different and their bodies react differently to high elevations. Just take it easy for the first couple of days – you will be completely fine!
