My 8 month old son wont sleep threw the night. barely takes naps during the day. what can i do?

Sleep: Some causes of sleep problems: overfeeding, underfeeding, faulty feeding with swallowed air in the stomach; too much cloth, too less chothing; too much noise, too much silence, too dark, too much light, too warm, too cold room, etc. If these needs to be corrected, then fix. Use night light, play a soft music etc. If these doesn't help, talk to your pediatirician.