walking on tip toes

[december]

Hi DS 18 mnths, walks on his tippy toes now and again, any ideas why? is this normal. he has bene walking for 4 mnths now, so its quite weird.

At 18 mtnh check up last week, MCHN said that he was developing how he should, and she would pick up if anything was out of sorts. (oh but he didnt tip toe in front of her, and i dint mention it)

I was a little concerned, as he only has about 6words or so, which he doesnt alway suse. Hypo. go go go.
& MCHN claimed all normal.. she also mentioned if they think something is wrong at 18 mnths they will let u know.. so i guess we need to trust on mchn..