Although most common during adolescence, acne can occur at other times in life, especially during times of hormonal shifts. Blackheads or pimples may be a problem on the face, neck, chest and back when pores become infected or clogged with oil. The bacteria involved is always present on normal skin. Therefore, improving the skin’s resistance to infection is important. Most cases of acne can be resolved through hygiene and nutrition. Homeopathic medicines may be helpful during flare-ups, but a chronic treatment, prescribed by an experienced homeopathic physician, is the most appropriate way to deal with severe or persistent skin problems.