Doctors in Britain, Italy and Spain have been warnedto look out for a rare inflammatory condition in children.The condition is possibly linked to the new coronavirus.Earlier this week, Britain's Paediatric Intensive Care Society sent a notice to the country's doctors.It said that in the past three weeks, there has been an increasein the number of children with "a multi-system inflammatory state requiring intensive care."The group said there was "growing concern" that the conditionis related to COVID 19, the disease caused by the virus.However, the group also suggested a different, unidentified disease might be responsible.Russell Viner is the president of the Royal College of Paediatrics and Child Health.He told the Associated Press: "We already know that a very small number of childrencan become severely ill with COVID-19 but this is very rare."Viner added that the condition was likely causedby an overreaction of the body's natural defenses, or immune system.And he noted similar symptoms had been seen in some adults infected with the coronavirus.The cases were also reported to have qualities similarto a rare blood vessel disorder known as Kawasaki disease.Symptoms of Kawasaki disease include a high body temperature that lasts for five days or more.They also include skin conditions and swollen parts of the neck.Only some of the children tested positive for COVID-19.So scientists are unsure if these rare symptomsare caused by the new coronavirus or by something else.Health officials estimate there have been about ten to 20 such cases in Britainand NHS England said it is urgently investigating the reports.Viner said that doctors were considering other possible causes for the syndrome,including other viruses or new medicines.But they are treating the cases as if they are "COVID-related."Spain's Association of Pediatrics recently made a similar warning.It told doctors that in recent weeks, there had been a number of school-age childrensuffering from "unusual" stomach pain, along with other stomach issues.These issues could lead within hours to shock,low blood pressure and heart problems, the group noted.The group urged doctors to recognize the symptoms and send these patients to a hospital.In Italy, Angelo Ravelli of Gaslini Hospital and a member of the Italian Pediatrics Society,sent a note to 10,000 medical experts raising his concerns.Ravelli and his team reported an unusual increase in the number of patientswith Kawasaki disease in parts of Italy hit hard by the coronavirus.He noted some children had COVID-19 or had contacts with confirmed virus cases."These children do not respond to traditional treatment," he said,adding that some were given a large amount of the drug known as steroids.James Gill is with Warwick Medical School.He said while the reports were concerning,there was still no hard evidence that the rare syndrome was caused by COVID-19."Regardless of source, multi-system inflammatory diseases are ... serious for childrenand ... intensive care teams, so keeping an extra eye outfor new symptoms arising in the patients we see is always a good thing," he said.Some possible cases have also been reported in France and Belgium.To date, children have been among the least affected group by the coronavirus.Data from more than 75,000 cases in Chinashowed they represented 2.4 percent of all cases and mostly suffered only mild symptoms.The World Health Organization said it was attempting to gather more informationon any new, coronavirus-related syndrome in children.But it had not received any official reports about it so far.