Last season, a mystery Kristaps Porzingis illness curtailed the Boston Celtics' title-retention bid in the playoffs. The illness has since been revealed as postural orthostatic tachycardia syndrome (POTS), a disorder that affects the nervous system.It's possible that Porzingis, who now plays for the Atlanta Hawks, is still dealing with POTS, as Shams Charania reported Sunday that he would be sidelined for the next two weeks due to illness."He and doctors found solutions over the summer to manage his health and he entered the Hawks season in good condition, before recent bout of illness," Charania tweeted.Shams Charania @ShamsCharaniaLINKPorzingis was diagnosed with the autonomic condition, postural orthostatic tachycardia syndrome (POTS), last season in Boston. He and doctors found solutions over the summer to manage his health and he entered the Hawks season in good condition -- before recent bout of illness.This latest report begs the question: What are the implications of the previously identified Kristaps Porzingis' illness for the one-time NBA champion's well-being?According to the Cleveland Clinic, POTS causes the heart to "beat faster than normal," specifically when one goes from a sitting or lying position to standing. Symptoms of POTS include dizziness, brain fog, shortness of breath, chest pain, and fainting.This illness Kristaps Porzingis is suffering from affects an estimated one to three million people in the United States. According to the Cleveland Clinic, the symptoms of POTS "may come and go for years." No cure has been found, but a number of management strategies exist. Doctors may prescribe isometric exercises, increased sodium intake, or adjustments to sleeping positions.While POTS could cause a great deal of inconvenience for non-athletes, an active NBA competitor would find it even more burdensome, given the physical toll of the regular season and playoffs. The Hawks can hardly be blamed for taking a cautious approach to managing Porzingis' health.Kristaps Porzingis illness adds to Atlanta Hawks' injury woes as they face SixersAside from Porzingis being sidelined, the Hawks will also be dealing with injuries to three other players, who have been deemed out for Sunday's game against the Philadelphia 76ers.These players are Trae Young (MCL), Jacob Toppin (shoulder) and N'Faly Dante (concussion protocol).Meanwhile, Nickeil Alexander-Walker will be available against the Sixers. He has been nursing a right ankle sprain.