On an educational tour to Nilgirls Nitish and his friends observed the local people.Few fo them were with swollen neck.
It is a disease ? If so what is the cause? How is the discase treated?

Explanation

1. Swollen neck is due to Simple goltre , a discase caused by hyposecretion of thyroxine by thyroid gland.
2. It is due to deficiency of Iodine which is obtained from salt.
In coastal areas the salt content of the soil is good and all fruits vegetables etc are rich in salts.
4. In hilly areas the soil has very little salt content so people do not get enough iodine through their diet.
5. Treatement is done by medication.