Which are the symptoms of Smith Magenis Syndrome?

Baby
feeding problems, failure to thrive, weak muscle tone, prolonged napping and lethargy.
later in childhood and adulthood
disturbed sleep patterns (difficulty falling asleep, regular waking throughout the night and sleepiness in the day), as well as behavioural problems.
Can include
Frequent temper tantrums, impulsivity, anxiety, distractibility, aggression and self-injurious behaviours including self-hitting, self-biting, and skin picking
Self-hugging’ hand licking and page flipping (“lick and flip”) behaviour, mouthing objects, insertion of hand in mouth, teeth grinding, body rocking, and spinning or twirling objects.
abnormal curvature of the spine (scoliosis), reduced sensitivity to pain and temperature, possible toileting difficulties and a hoarse voice. Some individuals also have ear abnormalities that lead to hearing loss and also possible vision difficulties. Although less common, heart and kidney defects have also been reported