The five patient photos show the external nose from front and profile, but they cannot show the internal septum or confirm its deviation. Alternating blockage can occur with the normal nasal cycle, turbinate swelling, allergies, or a septal deviation; sleeping on one side does not establish the cause. Please see an ENT or board-certified rhinoplasty surgeon for an internal examination and, if needed, nasal endoscopy. A septoplasty is considered when obstruction is persistent and the internal findings match your symptoms—not from photographs alone. Saline and allergy treatment may help mucosal swelling if appropriate for you, but they will not straighten a structurally deviated septum. Seek prompt care for sudden severe obstruction, recurrent heavy bleeding, fever, or significant pain.