Your baby has a fairly common problem called 'sterno mastoid spasm' or 'torticollis'. This is a spasm of one of the main muscles of your baby's neckbon the left side in his case. This can be easily treated by a physiotherapist so your baby needs to be seen by a physiotherapist.
Do not be concerned about your baby's testes yet.They are often retractile at this age and simply keep moving up and down in and out of the scrotal sac.If they are not down in the scrotum by 6 months ask your paediatrician to see him again.
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