Are all cosmetics safe?

No: When you say all, the answer is always no. There are cosmetics that can cause skin irritaion, rash, etc. On some people.

No: Most are probably safe but many people have sensitivity to different materials, creams, aromas, etc.

Safe Cosmetics: Depends on whether you have allergies to particular substances that may be in a cosmetic and the amount of allergen the cosmetic may contain. Consider going to a physicial who treats allergies to be evaluated if there is a history in your family or if you believe you have an allergy to cosmetics or if you have had an allergic reaction in the past.