Hi,
How are you? What other symptoms are present? Can you elaborate on the blue tent that you mentioned? If you are referring to perioral cyanosis, this could be due to problems with circulation or breathing drug overdose; continuous seizures; respiratory diseases; and even cardiac diseases and illnesses. It is best that further evaluation be done to determine the underlying cause and to rule out heart issues. Additional diagnostic tests may need to be done also. Take care and best regards.
Could that possibly be a blue tint, rather than a blue tent?