Marigold is a popular garden flower and is also a useful herb though it isn't used as much today as it was in the past. Also called Calendula, the use of marigold as a medicinal herb dates back many centuries. In more recent times, it was used during the Civil War and World War I to treat wounds and prevent infection. It is also anti-fungal so is useful in treating ringworm and athlete's foot. Marigold petals can be boiled to make an eyewash. 
    Also boiled as a tea, it can be used to treat sores and ulcers in the mouth and stomach ulcers. The tea is also sometimes recommended for treating gall bladder problems and menstrual problems. It can also help swollen glands. 
     It can also treat leg ulcers and bed sores. Marigold ointment can be used for varicose veins and hemorrhoids. Petals of the marigold flower can be rubbed on bee and wasp stings to reduce the stinging and swelling. It can also relieve the pain of sprains and wounds. It controls bleeding and helps damaged tissue heal. It is sometimes useful in treating fevers. In some parts of the world, it is used to treat measles and smallpox. The leaves of the marigold plant, when added to a salad, have been used to treat scrofula in children (a form of tuberculosis affecting lymph nodes in the neck). The leaves are also used to remove warts. It is a natural treatment for acne.  It is used in aromatherapy as a treatment for skin problems.