Nicotiana, tobacco

 The wild varieties, like tree tobacco, are often very strong. Topically good for pain and swelling. Good in hemorrhoid salve. Leaves in a bath are good for sprains, strains, bruises... but only for short bath; it can make you can pass out or get dizzy. Great for bee stings and such. Diminishes inflammation.

From  SPECIFIC INDICATIONS FOR HERBS IN GENERAL USE Third edition Michael Moore:

NICOTIANA 

Topical in arthritis. Muscular pain, as a poultice or fomentation.

Tree Tobacco

Latin name: Nicotiana glauca

Family: Solanaceae (Nightshade Family, Potato Family)

Medicinal use of Tree Tobacco: A poultice of the leaves can be applied to cuts, bruises, swellings and other wounds. The plant has been used as a poultice for removing the pus from scrofulous sores or boils. A poultice of the leaves has been applied to inflamed throat glands. An infusion of the leaves has been used as a steam bath in the treatment of rheumatism.

Wild Tobacco

Latin name: Nicotiana rustica

Family: Solanaceae (Nightshade Family, Potato Family)

Medicinal use of Wild Tobacco: All parts of the plant contain nicotine which is a strong narcotic. The leaves are antispasmodic, cathartic, emetic, narcotic and sedative. They are used externally as a poultice and a wash in the treatment of rheumatic swelling, skin diseases and scorpion stings.

Tobacco

Latin name: Nicotiana tabacum

Family: Solanaceae (Nightshade Family, Potato Family)

Medicinal use of Tobacco: Tobacco has a long history of use by medical herbalists as a relaxant, though since it is a highly additive drug it is seldom employed internally or externally at present. The leaves are antispasmodic, discutient, diuretic, emetic, expectorant, irritant, narcotic, sedative and sialagogue. They are used externally in the treatment of rheumatic swelling, skin diseases and scorpion stings. The plant should be used with great caution, when taken internally it is an addictive narcotic. The active ingredients can also be absorbed through the skin. Wet tobacco leaves can be applied to stings in order to relieve the pain. They are also a certain cure for painful piles. A homeopathic remedy is made from the dried leaves. It is used in the treatment of nausea and travel sickness.

medicinal herbs: TOBACCO - Nicotiana tabacum (naturalmedicinalherbs.net)