Could it be that he is teething?
Here are some signs commonly associated with teething:
- irritability or fussiness
- drooling (could lead to facial rash)
- gum swelling and sensitivity
- gnawing or chewing behaviour
- refusing food
- sleep problems
For more information on signs of teething: http://www.babycenter.com/0_teething-your-babys-first-teeth_11243.bc
(While fever is commonly associated with teething, it is not one of the symptoms agreed by the doctors. Hence, provided the list of symptoms for your reference. One common sign is excessive drooling. If your boy is teething, that may explain the sleeping problems..)
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