Abdominal bloating and distension 

Everyone experiences abdominal pain from time to time. Other terms used to describe abdominal pain are stomach-ache, tummy ache, gut ache and bellyache. Abdominal pain can be mild or severe. It may be constant or come and go. Abdominal pain can be short-lived, also called acute. It also may occur over weeks, months or years, also known as chronic. 

Everyone occasionally has diarrhea — loose, watery and more-frequent bowel movements. You might also have abdominal cramps and produce a greater volume of stool. The duration of diarrhea symptoms can provide a clue to the underlying cause. 

Acute diarrhea lasts from 2 days to 2 weeks. Persistent diarrhea lasts 2 to 4 weeks. Acute and persistent diarrhea are typically caused by a bacterial, viral or parasitic infection of some sort. 

Chronic diarrhea lasts longer than does acute or persistent diarrhea, generally more than four weeks. Chronic diarrhea can indicate a serious disorder, such as ulcerative colitis or Crohn's disease, or a less serious condition, such as irritable bowel syndrome. 

Sources:  
The Mayo Clinic 
Post-Covid recommendations for primary care physicians – Switzerland  
Practical management of post-Covid19 disease, Dr Ioannis Kokkinakis, Dr Mathieu Saubade, Dr Konstantinos Tzartzas, Dr Serge De Vallière, Dr Catherine Duquenne, Pr Gilles Allali, Dr Frédéric Regamey and Pr Bernard Favrat - Rev Med Suisse 2023