Is it normal to her zits like this?
I’m 39 year old male who is clean with clear skin. Every so often I develop a very painful pimple that takes month to heal and one time took over a year on my face or jaw. When I get them they are extremely hard and are not raised up much. They are very solid to the touch and when squeezed they never pop but just leak clear oil. I even sliced them open and lanced them with a needle to try and drain them but that doesn’t help. I used all the over the counter rubs and that doest help. Are these normal? What causes them and any advice on a remedy?