Blackhead is an open pore on the skin that is covered by black colored debris. When there is blockage in the skin pore, dark spots are formed and this causes the formation of blackheads. This skin problem mostly attacks during the age of puberty. At this time, hormonal changes cause sebum overproduction. Blockage in sebum and deposition of bacteria leads to blackheads. They can be seen on face as well as nose. People who have oily skin have blackheads. Some other causes of blackheads are unclean skin, caffeine, stress, use of cosmetics and smoking. Home remedies can remove the blackheads very effectively. The top 7 home remedies for blackheads are as follows.