The only precaution to take note of is that DHA must not get into the eyes or inhaled through the nose. Therefore, you must make sure that the spray does not get too close to your eyes, mouth or nose. To help you achieve this, you can wear lip balm, earplugs and nose plugs or filters. You can also hold your breath when the spray is close to your nose. You can afford not to spray tan your entire face and use a bronzer to match your face with the rest of your body.
Also, most spray tanning products contains Aloe Vera which is very useful to the body. Aloe vera is known to be useful in removing acne from the body after spray tanning. However, these two ingredients mentioned are not the only substances found in the spray tanning solutions. There are also other ingredients present in the solution. But as far as medical science is concerned, the active ingredients in the tanning solutions are not harmful to the body and so it can be said that tanning your skin is safe.