The class of herbs known as alterative herbs are conceptualized traditionally as 'cleansing' the body's tissues. They are thought of as detoxifying herbs, but they don't work in any obvious way on the body's elimination channels. - Namely, the lungs, kidneys, or colon. As such, they do not easily fit into a Western model of understanding the body. However, they do have a long tradition of use, and are certainly worth trying as an acne home remedy. Because they work on the internal condition of the body, they are not going to replace any of the topical, over the counter acne treatments. But they may provide benefit in an indirect way that these acne products don't.
Alterative herbs tend to be quite gentle in their effect, so they are best used as a long term treatment. Results won't be sudden, but they will improve the general health of the body. They tend to be given for chronic inflammatory problems, especially relating to the skin, such as acne.
These herbs include burdock, cleavers, red clover, figwort, poke root, echinacea, and blue flag. A great combination is blue flag, burdock, yellow dock, and echinacea. These can be mixed together and infused with hot water to make a tea. Drink a cup of this 3 times a day. You can put a little honey in it to make it taste better.
Another possible combination is burdock, dandelion, and sarsaparilla (not the cola!). Mix these together when they are dry herbs, and make a tea in the same way. They can be used separately as well.
There are a number of options for topical acne home remedies as well. Tea tree oil can be applied directly to breakouts, though for those with sensitive skin this may need to be diluted. Fresh cabbage juice can also be applied directly to acne blemishes, and this may be a better option for those with sensitive skin.
An anti inflammatory skin wash can be made from calendula and chamomile. Make a tea as above, then let it cool and keep it in the fridge. Spray or dab this onto the affected areas regularly.
Another combination for an acne home cure skin wash is yarrow, elder flowers, and lavender.
Colloidal minerals such as potassium phosphate and magnesium phosphate can help support the skin. Zinc is excellent to help prevent scarring, as well as fortifying the immune system, and help supports the normal functioning of hormones.
Vitamin C is excellent for encouraging the healing of acne lesions, as well as providing antioxidant support to the immune system.
References:
1. Simon Mills, The Essential Book Of Herbal Medicine
2. Judy Jacka, A - Z Of Natural Therapies
3. Paul Bedson, The Complete Family Guide To Natural Healing