My baby who is 8months old cannot sleep well although he feels sleepy and restless.I discused with his doctor but he said that might be his character but I don't think so.because he losing weight.moreover his also active,please help to deal with these.thank you

Does he cry or whiny? Still on formula? Eats okay? Teething? Bowel movements regular soft/hard? Has he always been like this or recently? You may have to be a bit more specific. Most babies do not sleep well or as much.