I did a quick google search and this is what I found. I'm not sure how to react, but I think I'll keep a door open and a fan blowing out and drink water.

http://www.odot.state.or.us/tddresearch/reports/state549.pdf

Western Red cedar can cause skin rashes on those skin surfaces exposed to the wood. Additionally, approximately one to five percent of workers exposed to Western Red cedar contract red cedar asthma. The exposure period to asthma can be as little as six weeks, to three years (Pittman 1999).

http://bodd.cf.ac.uk/BotDermFolder/BotDermC/CUPR.html

Chamaecyparis lawsoniana Parl.
(syn. Cupressus lawsoniana Andr. Murray)
Lawson Cypress, Port Orford Cedar
White (1934) noted that splinter wounds from the wood were slow to heal.
The foliage of this tree can produce dermatitis, and the wood can cause asthma in wood-workers (Rasch 1923/24, Schonwald 1929, Stier 1929, White 1934, Hausen 1970). Woods & Calnan (1976), however, found that none of the literature cited by Hausen (1970) provided convincing evidence for contact dermatitis.
The powerful resinous odour of the newly-cut wood was said to cause troublesome diuresis in saw mill workers (Sargent 1896). The pollen can cause pollinosis (Wodehouse 1971).
Fitzgerald et al. (1957) reported the presence of desoxypodophyllotoxin in the leaves of this species. Only traces of â-thujaplicin and no other tropolones have been found in the heartwood (Zavarin & Anderson 1956, Zavarin et al. 1959). [ For browsers not fully compliant with HTML 4.0, â-thujaplicin denotes beta-thujaplicin ]

http://uscneurosurgery.com/glossary/d/diuresis.htm

Diuresis-
Stimulation of increased volume of urination.

Decreases total body (and central nervous system -- brain and spinal cord) water volume.

Decreasing brain tissue volume decreases intracranial pressure according to the Monro Kellie model.

: I'm just starting out and have been milling strips for a couple days (hour or
: two at a time). I have a dust collection system and have one door open
: sometimes. I have been milling western red cedar, walnut and Port Orford
: cedar. The western red has a strong odor and my middle son can't be in the
: shop or his athsma kicks up. The Port Orford has an EXTREMELY strong odor
: that fills the shop and garage. It lingers for days and is still strong in
: the shop. The smell is in my shop clothes and therefore in our closet as
: well.

: I wonder if anyone know or knows how to find out if I need to be fanatical
: about the dust (forced ventilation, Tyvek suit that stays in the shop,
: wash the room out) or just let it dissapate and keep the floor swept up?

: Thanks for any help

: Steve

: PS. The Port Orford is really pretty though...