Here is a list of the things that can clog up your pores and cause blackheads, pimples, breakouts and irritations on your skin. Don't take the ingredients as they are - check the products you have or you want to buy and see how many of those ingredients they contain. If the number of bad stuff in your products is big than try to not use those products anymore or to just use them rarely. If you have products for the body it's not that bad, only if you suffer from acne on your body obviously. Your face can and will be affected by today's makeup and face care products, even if you have very healthy skin! Don't play around with your skin's good luck!

I hope this helps! Enjoy!
Watch out for:
Acetone - usually in nail polish (so don't touch your face with your fresh done nails for a while)
Acetylated Lanolin - clogs up pores and gives you blackheads
Acetylated Lanolin Alcohol - clogs up pores and irritates
Algae Extract - very irritating and clogs up pores
Algin - bad for skin in general
Almond Oil - clogs up pores if used on face (this one is good in creams for dry skin all over the body)
Apricot Kernel Oil - also bad for the face but good for the body
Arachidic Acid - clogs up pores but not if used rarely
Ascorbyl Palmitate - clogs up pores but not if used rarely
Avocado Oil - clogs up pores on face
Azulene– clogs up pores
BHA or Butylated Hydroxyanisole – clogs up pores and irritates the skin
Benzaldehyde – clogs up and irritates (all added fragrances usually do that to the face)
Benzoic Acid – clogs up and irritates
Butyl Stearate – clogs up pores but doesn't irritate
Cajeput Oil – clogs up and irritates very bad
Camphor – clogs up and irritates at a medium level
Capric Acid – clogs up and irritates at a medium level
Caprylic Acid 1 – doesn’t clog pores but irritates
Carrageenan – clogs up pores very bad and irritates
Cetearyl Alcohol – clogs up and irritates at a medium level
Cetearyl Alcohol + Ceteareth 20 – clogs up pores very bad and irritates at a minimum level
Cetyl Acetate – clogs up very bad and doesn’t really irritate
Cetyl Alcohol – clogs up and irritates at a medium level
Chamomile – just clogs up at a minimum
Cocoa Butter – clogs up pores badly but doesn’t irritate
Coconut Butter – clogs up pores badly but doesn’t irritate
Coconut Oil – clogs up pores badly but doesn’t irritate
Colloidal Sulfur – clogs up and irritates badly
Corn Oil – just clogs up badly
Cotton Awws Oil – just clogs up badly
Cotton Seed Oil – just clogs up badly
Crisco – just clogs up badly
D & C Red # 17 – clogs up pores bad
D & C Red # 19 (Pigment – Color – banned on the market) – clogs up pores
D & C Red # 21 – clogs up pores
D & C Red # 3 – clogs up pores
D & C Red # 30 – clogs up pores
D & C Red # 36 – clogs up pores
D&C Red #27 – clogs up pores at a minimum
D&C Red #40 – clogs up pores and irritates at a minimum
Decyl Oleate – clogs up pores badly
Dioctyl Succinate – clogs up pores badly and irritates at a medium level
Disodium Monooleamido PEG 2-Sulfosuccinate – clogs up pores very bad and irritates at a medium level
Emulsifying Wax NF – clogs up and irritates at a minimum level
Ethoxylated Lanolin – just clogs up pores badly
Ethylhexyl Palmitate – just clogs up pores badly
Flowers of Sulfur – just irritates badly
Glyceryl Stearate SE – clogs up pores bad and irritates at a minimum level
Glyceryl-3-Diisostearate – just clogs up pores badly
Hexadecyl Alcohol – just clogs up pores badly
Hexylene Glycol – just clogs up pores at a medium level
Hydrogenated Vegetable Oil – just clogs up pores badly
Isocetyl Alcohol – clogs up pores and irritates badly
Isocetyl Stearate – just clogs up pores very bad
Isodecyl Oleate – just clogs up pores very bad
Isopropyl Alcohol – irritates very bad
Isopropyl Isostearate – just clogs up pores badly
Isopropyl Linolate – just clogs up pores badly
Isopropyl Myristate – clogs up pores badly and irritates at a high level
Isopropyl Palmitate – just clogs up pores badly
Isostearyl Isostearate – just clogs up pores badly
Isostearyl Neopentanoate – irritates and clogs up pores at a medium level
Lanolin Alcohol – clogs up pores at a minimum level (but still, it does)
Laureth 23 – clogs up pores at a minimum level (but still, it does)
Laureth 4 – clogs up pores and irritates very bad
Lauric Acid – clogs up pores badly
Mink Oil – clogs up pores at a medium level and irritates at a minimum level
Myristic Acid – just clogs up pores at a medium level
Myristyl Lactate – clogs up pores badly and irritates at a medium level
Myristyl Myristate – clogs up pores very bad and irritates
Octyl Palmitate – just clogs up pores badly
Octyl Stearate – clogs up pores and irritates very bad!
Oleth-3 – clogs up pores very bad and irritates a bit
Oleth-10 – clogs up pores and irritates at a minimum level
Oleyl Alcohol – clogs up pores badly and irritates
Olive Oil – clogs up pores a bit
PEG 100 Distearate – clogs up pores a bit
PEG 150 Distearate – clogs up pores a bit
PEG 16 Lanolin – clogs up pores badly and irritates
PEG 200 Dilaurate – clogs up pores and irritates at a medium level
PEG 8 Stearate – just clogs up pores at a medium level
PG Dipelargonate – clogs up pores at a minimum level
PG Monostearate – just clogs up pores at a medium level
PPG 2 Myristyl Propionate – clogs up pores very bad and irritates at a medium level
Palmitic Acid – clogs up pores a bit
Peanut Oil – clogs up pores at a minimum level
Pentarythrital Tetra Isostearate – clogs up pores at a minimum level
PG Dipelargonate – clogs up pores and irritates at a minimum level
Polyglyceryl-3-Diisostearate – clogs up pores badly
Potassium Chloride – clogs up pores very bad
Propylene Glycol Monostearate – clogs up pores at a maximum level
Red Algae – clogs up pores at a maximum level and irritates at a minimum level
SD Alcohol 40 – just irritates at a maximum level
Sandelwood Seed Oil – clogs up pores at a minimum level
Sesame Oil – clogs up pores at a minimum level
Shark Liver Oil – clogs up pores and irritates at a medium level
Sodium Chloride (Salt) – clogs up pores at a maximum level
Sodium Laureth Sulfate – clogs up pores and irritates at a medium level
Sodium Lauryl Sulfate – clogs up pores at a maximum level and irritates at a minimum level
Solulan 16 – clogs up pores and irritates very bad
Sorbitan Oleate – clogs up pores at a medium level
Sorbitan Sesquinoleate – clogs up pores very bad and irritates
Soybean Oil – just clogs up pores at a medium level
Steareth 10 – clogs up pores very bad and irritates
Steareth 2 – clogs up pores and irritates at a minimum level (but still does, don’t forget!)
Steareth 20 – clogs up pores and irritates at a minimum level (but still does, don’t forget!)
Stearic Acid – clogs up pores and irritates at a minimum level (but still does, don’t forget!)
Stearic Acid Tea – clogs up pores and irritates at a medium level (but still does, don’t forget!)
Stearyl Alcohol – clogs up pores and irritates at a minimum level (but still does, don’t forget!)
Stearyl Heptanoate – clogs up pores really bad
Sulfated Castor Oil – clogs up pores and irritates at a medium level
Sulfated Jojoba Oil – clogs up pores and irritates at a medium level
Syearyl Heptanoate – clogs up pores really bad
Tocopherol – clogs up pores and irritates at a minimum level (but still does, don’t forget!)
Tridectyl Neopentanoate – irritates badly
Triethanolamine – clogs up pores a bit
Vitamin A Palmitate – clogs up pores and irritates at a minimum level (but still does, don’t forget!)
Wheat Germ Glyceride – clogs up pores and irritates at a medium level
Wheat Germ Oil – clogs up pores at a maximum level and irritates
Xylene – clogs up pores badly and irritates pretty bad