Hi LittleToadstool, my DS was exactly the same, generally favoured his left side, and seemed unable/unwilling to turn his head to the right.
I noticed it from about 2 weeks. I spoke to the HV who said "oh well just try facing him the other way", but it didn't improve. I took him to the doctor's at 5 weeks who said some babies just prefer looking in one direction. But I knew he wasn't right - sometimes he seemed to want to look to the right and just wasn't able to get his head past about 45 degrees, whereas on the left side he could get his head round the full 90 degrees. When I encouraged him to turn he would get distressed, as if in discomfort. Eventually I spoke to another doctor who agreed it warranted a referral to a physiotherapist.
The physio was wonderful, she gave me some simple, gentle exercises (basically turning his head gently to the left several times a day) and some bits of advice eg change his cot around so that in order to look at you in bed he has to turn his head to the unfavourable side, hang toys on the "bad" side of his head in the pram, generally encourage him to turn his head as much as possible.
I noticed an immediate improvement and within about 3 months (and two further phyio visits) his head was fully mobile.
I never got to the bottom of what caused it but from research and talking to various HPs they raised several possibilities:
- There is a condition called wry neck, in which a small muscle swelling affects the mobility of the head (my DS didn't have this but it needs to be investigated)
- Some babies, like MamaGhoul's DD, have an assymetric head that can make it more comfortable for them to put their head in one direction
- Some babies have their heads turned in one direction in the uterus and it causes one tendon to elongate and the other to shorten, gradually by using both tendons this corrects itself/can be corrected.
I think my DS was probably a combination of 2) and 3) but it needs investigating and if you think your baby's head mobility is not right then insist on a referral to a physio, these things are very easily corrected if caught early. Since then I have found it's apparently quite common, I now know several other mothers whose babies had the same thing, some self-corrected, others needed mild physio.
Incidentally, I wouldn't recommend trying the exercises I mentioned without being told to by a physio, if you do them wrongly it could hurt your baby. However turning his cot and generally encouraging him to look to the right couldn't do any harm while you're waiting to see someone.
HTH - and sorry for the long post!