Gingival bleeding
Easy bruising
Petechiae
Corkscrew hair
Perifollicular hemmorrhage
Weakness, fatigue, and muscle cramping
Vitamin C is cofactor for enzymes involved in biosynthesis of carnitine, which is essential for release of energy via transport of fatty acids into mitochondria
Mood disturbance, cognitive impairment, delusions and depression
Vitamin C is a modulator of neurotransmitter synthesis and release (e.g. Dopamine)
Anemia
Vit C promotes intestinal absorption of Iron and prevents oxidative damage to the red-cell cytoskeleton
Vitamin C is cofactor for enzymes involved in biosynthesis of carnitine, which is essential for release of energy via transport of fatty acids into mitochondria
Vitamin C is a modulator of neurotransmitter synthesis and release (e.g. Dopamine)
Vit C promotes intestinal absorption of Iron and prevents oxidative damage to the red-cell cytoskeleton
Scurvy
Abnormal platelet count and/or coagulation
Rickets
Septicemia
Porphyria
Idiopathic thrombocytopenic purpura 
Bandemia
Hemolytic uremic syndrome