If you feel choking or if it’s becoming hard to let out your voice, commonly at the halfway point of singing a song, then you are suspected to have hypertonic phonation or LDP (Larynx Deep Position).
This is not relating to the skill of singing. This issue is relating to the muscles of the throat. The muscles become stiff and in turn, cause the larynx move into a deeper than normal position.
This is a muscle habit which adversely affects singing.
It is better to treat this condition in the early stages of discovery. When gone untreated can cause more, depending on the degree, or even permanent damage to the throat’s muscles.
Note: Hypertonic phonation, as mentioned above, is not a disease. It is a treatable condition.