touching your face all the time and not taking showers all the time.
No, masturbation does not cause acne.
Allergies do not cause acne
No, contacts do not cause acne.
Pregnancy changes your hormone balance, and this can cause acne at any time during your pregnancy. Every woman is different though: some may get acne, and some may not.
If you have acne free skin you should not use acne products to prevent it. This may not cause acne but may cause rashes or other skin problems. But if you had acne and by using acne products you got acne free skin, in that case you need to use acne products to maintain your condition. This will definitely help to prevent zits. However the recommended usage of product would be lower than what you used to use with acne condition. The best guide would be a dermatologist or an expert's advice. I have listed a useful resource for you.
Yes, acne is caused by overly active oil glands.
Most teens are able to use over-the-counter acne products containing benzoyl peroxide. For adults, this treatment may cause the skin pigmentary changes and cause the individual to look older. Adults may opt for cosmetic treatment such as microdermabrasion or chemical peels.
The first appearances on the male face would be acne . If you touch your skin when you have not washed your hands it may cause you to have an even worse case of acne.
No, it helps get rid of acne.
The main cause of acne has to do oil glands in the skin. During certain times, especially during puberty, the oil glands are stimulated by hormones. Too much oil causes acne.
No, marijuana causes no kind of skin defects
Yes, diet can certainly cause acne.