Decoction of kachnar (Bauhinia) bark — the classical remedy: boil 1 tsp bark powder in a cup of water till half, take morning-evening. Charaka names galaganda among neck swellings.
Traditional
जौ · Barley
Old barley, moong and light food; avoid heavy, sour and kapha-increasing food — the classical pathya for galaganda.
Traditional
मूँग दाल · Moong dal
Moong in place of the heavier pulses — light and kapha-clearing, the pulse allowed in galaganda. The thyroid itself needs a TSH test, not diet alone.
Traditional
On this page Documented — There are human studies behind this ingredient for this particular complaint. Traditional — Carried by tradition and experience; modern evidence for this particular complaint is limited.
All of this is what others have found — tradition, shared experience and the studies done so far. It is not advice given to any one person. Before changing your diet, and especially if you take any medicine, ask your dietician or doctor.
Naturopathy
Gentle neck exercises and warm compress; get thyroid tested — this needs a doctor alongside.
Foods that help
जौ · Barleyमूँग दाल · Moong dal
What to cut down
दही · Curdभारी तला भोजन · Heavy fried foodखट्टा भोजन · Sour food
Pick what's in your kitchen and see which remedy fits you best.