CLove is a spice like Cumin, Coriander seed, Onion, Garlic etc.
Cloves are the aromatic flower buds of a tree in the family Myrtaceae, Syzygium aromaticum. They are native to the Maluku Islands in Indonesia, and are commonly used as a spice. Wikipedia
 Clove has many health benefits. Some of them are mentioned below:
  1. Relieves toothache.

Clove has amazing benefit for health.Clove helps us in  different way .As for example, Toothache,Respiratory infections,Digestion,Sexual Health, Inflammation etc. You can temporarily alleviate the pain by dabbing a little clove oil on a cotton ball and placing it on the sore tooth or on your gums . An added benefit is that it will also pull out any infection.

  1. Relieve upper respiratory infections.

Ayurveda suggests making a tea with clove to lessen, or prevent, colds and flu. It is also used as an expectorant, making it easier to cough up phlegm. Cloves are a natural painkiller and also attack germs, so they’ll help you get rid of that sore throat.

  1. Reduce inflammation.

Use clove oil to massage sore muscles; some also use it for arthritis and rheumatism.

  1. Treat scrapes and bruises.

Cloves are pretty strong and can sting, so the best bet is to probably make a poultice with a little olive oil.

  1. Improve digestion

Cloves help relax the smooth lining of the GI tract, so they help alleviate vomiting, diarrhea, intestinal gas and stomachaches. Just be careful; since they’re strong, they can also irritate the stomach.

  1. Enhance sexual health 

Sometimes used as an aphrodisiac, cloves can also help men from reaching orgasm too early.

7. Diabetes Control

In patients suffering from diabetes, the amount of insulin produced by the body is either insufficient, or it is not produced at all. Studies  have revealed that extracts from cloves imitate insulin in certain ways and help in controlling blood sugar levels.

8. Bone Protection.

The extracts of cloves include phenolic compounds such as eugenol and its derivatives, such as flavones, isoflavones, and flavonoids. These extracts have been particularly helpful in preserving bone density and the mineral content of bone, as well as increasing tensile strength of bones in case of osteoporosis.

Reference: Organicfacts