Drinking milk does not help with coughing and instead the milk could make the coughing worse especially if you have mucus buildup in your throat.
Drinking some warm or hot tea with some honey can help with coughing as the honey can help to soothe the throat and the tea can also help to break up any mucus and moisturize your throat.
Using a humidifier can also help with coughing and add moisture to the throat.
You can't damage your throat from coughing although you can cause irritation of the throat and a sore throat but the throat will heal within a few days to a few weeks.
No permanent damage will occur from coughing.
It is not possible to cough up a lung no matter how violently you cough as your trachea also called the windpipe is too small for one of the lungs to fit through so coughing up a lung is impossible.
You cannot and will not damage your lungs from coughing although coughing too hard or too much can irritate your lungs and throat and cause more coughing.
If you cough too much it may lead to irritation of your lungs and throat and may cause a sore throat as well as possible broken ribs, vomiting, urinary incontinence, headaches, fainting, dizziness, or sleeplessness.
Coughing up clear jelly like balls is a sign of allergens that get into your lungs and your body produces excessive mucus to get rid of the allergens.
The little white balls are basically just excess mucus that your body is trying to get rid of the allergens in.
The little white chunks that you cough up are tonsil stones.
The tonsil stones that are coughed up as white chunks are formed by debris which build up in your tonsils.
Most of the tonsil stones are small and are most commonly under 5mm across in size.
Your glands contain folds known as tonsillar crypts.
And if the tonsillar crypts become enlarged then minerals like calcium can then become trapped and then calcify or harden into tonsil stones.
When you cough up thick, solid white mucus, it can be a sign that you have a bacterial infection in your airways.
This type of an infection can sometimes require prescription antibiotics from your doctor to treat.
Tonsil stones smell because the bacteria and fungi feed on the mucus, food, and debris that gets stuck in the tonsil pits.
The anaerobic bacteria produces foul smelling sulfides giving it that distinct pungent smell.
Tonsil stones are also composed of many layers of living microbes.