There is a strong association of salicylate sensitivity with ADHD, due to their neuro-excitatory effect. Common symptoms include: hyperactivity, emotional melt-downs, hives, migraines, sinus, asthma and bowel disturbance. It fosters an addictive emotional attachment to their consumption, due to acute dopamine spiking brain reward.
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You will see dark circles noted as one of the symptoms toward the bottom of the Phenolic document (below):
Due to the neuro-excitatory effect of Salicylates, there can sometimes also be an association with ADHD: