Bloating and gas can be a sign of imbalance in your son’s digestive fire or agni, and you might be right to want address this. Sometimes, these are connected to diet or just stress factors which a young guy certainly experiences. First off, you’ve mentioned he’s having ajwain (carom seeds), kala namak (black salt), and saunf (fennel) — those are great starts. They’re known to aid digestion and help reduce bloating. But let’s try a few more things.
Consider this, in Ayurveda, it’s important to ensure the diet is warm and cooked, not heavy or cold. Perhaps try having him avoid food that’s too processed or has low prana (life-force energy). Instead, emphasize freshly cooked meals that are light like kichari or simple lentil soups. Reducing dairy might help too, sometimes it’s a culprit for gas and bloating.
Timing of meals matters too. Dinner should be light and eaten early, around 7:00 PM. Allow time before sleep for digestion. Encourage him to take a short walk after dinner - movement aids digestion.
Now for motions - a good digestive routine can do wonders. Try having him drink half a glass of warm water right when he wakes up. Warm water with a little ginger or lemon can stimulate agni without being harsh on his belly.
Check if he’s getting enough fiber from his diet, it’s a crucial for regular motions. A fruit like an apple or pear, and some cooked veggies daily can improve this.
Please keep an eye on stress levels too, teenage years are a bit of a rollercoaster. Yoga, light breathing exercises, or even just, some mindful time each day can be amazingly beneficial for the mind and body.
If symptoms persist or worsen, it’s important to consult a professional who can examine him in detail. Avoid letting it go untreated.



