Tonsil increases and decreases in size during and after infection and that is normal. It can remain big without symptoms and shrink with old age. If infected it can cause throat pain, fever, ear pain etc. So do not worry if it does not cause you these symptoms. If it causes difficulty in swallowing such as in Grade-4 tonsil size, it could be removed surgically if required. For bad breaths- also have a dental checkup. Gum infections, tooth plaques and infected tonsils can cause bad breath. Just do warm saline gargling 45sec twice daily after breakfast and dinner. Avoid antiseptic mouthwashes on a routine basis. Saline is better.

It is normal for the tonsils to increase and decrease in size when there's an infection. Bad breath is also called as halitosis There are a number of possible causes of halitosis, but the vast majority come down to oral hygiene. The causes for halitosis are tobacco, food, dry mouth, dental hygiene, crash diets, drugs, mouth, nose & throat infections, foreign body, diseases(liver failure, cancers & other metabolic diseases), ketoacidosis, bowel obstruction, bronchiectasis and aspiration pneumonia. I would advise you to visit a dentist so that you can be examined and the underlying cause can be found and treated accordingly. I would advise you to meet a ENT doctor to rule out any infections that you may currently have and have it treated accordingly. These following steps may help: - Be sure to brush at least twice a day, preferably after each meal. - Flossing reduces the build-up of food particles and plaque from between the teeth. - Anything that goes into your mouth, including dentures, a bridge, or a mouth guard, should be cleaned as recommended on a daily basis. - Bacteria, food, and dead cells commonly build up on the tongue, especially in smokers or those with a particularly dry mouth, so use a tongue scraper or brush your tongue - Drink plenty of water, aim to drink 3 liters of water per day - Avoid alcohol and tobacco, both of which dehydrate the mouth. - Avoid onions, garlic, and spicy food. - Reduce coffee and alcohol consumption. - Eating a breakfast that includes rough foods can help clean the back of the tongue. - Do salt water gargling with lukewarm water thrice a day If the condition persists or worsens visit the nearest ER.