I will be sitting down or laying down and at random will find myself either taking a deep breath out of nowhere or a short, quick inhale. In my mind I imagine it is like my lungs are keeping a normal rhythm and then just decide to either take a big gulp of inhale or exhale, etc. and then goes back to normal. Nothing medically alarming…just wondering why that happens and the physiology behind why that happen. Thanks in advance!
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All the answers here so far are wrong. Sighing every now and again is a necessary process to prevent your alveolar (the tiny air sacks where gas exchange takes place) from getting stuck together from surface tension and collapsing. If enough alveoli collapse then whole segments of your lungs can collapse and not function properly, a process called atelectasis.
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