In Egyptian mythology, Sekhmet was the goddess of the sun, fire plagues, healing and war. She had the head of a lioness and the body of a woman.  She was married to Ptah, the god of healing. They balanced each other. It was believed that her breath created the desert.
Sometimes known as sister to Bastet/Bast, a goddess who protected pregnant women and children.

Physical appearance 
Sekhmet had the head of a lioness and the body of a woman. She was usually depicted with a sun disc on top of her head. Many historians argue that she was from Sudan, since lions were plentiful there. When she was seated, she usually held the ankh of life, but when she was standing, she held a papyrus scepter, the symbol of Lower Egypt.

Power 
Sekhmet's breath represented a hot desert wind, and her body was the glare of the midday sun. She was created when Hathor came down to earth to take vengeance on man. Sekhmet became the destructive eye of the sun, and a solar goddess, and was named “Eye of Ra.” The ancient Egyptians knew that the sun could bring life, (Hathor), but also death. (Sekhmet). Her name translates as "The Powerful One." Sekhmet used her power destructively and brutally

The ancient Egyptians believed that Sekhmet took over sun and then the next morning she gave birth to the moon.

Fear of Sekhmet 
People were afraid of Sekhmet because along with her healing and protective powers, she was also destructive and retaliating. The ancient Egyptians believed that the "Seven Arrows of Sekhmet" would bring bad luck, so they used many charms and spells to protect themselves. There was a  "Book of the Last Day of the Year" which they recited over a piece of cloth and wore around their neck at the end of the year. This was considered to be a dangerous time. On the first day of the New Year (Wep Ronpet), people would exchange amulets in the form of Sekhmet to keep the goddess happy.

Worship 
Sekhmet had an unusual form of worship. She was worshipped evenly with her husband, Ptah, and her son, Nefertem. Her main cult center was in Memphis. Many priests recited complicated prayers, used to avert the rage of Sekhmet. A well-known prayer was called "The Last Day of the Year," and it was chanted while wearing a piece of cloth around one's head. The last day of the year was considered to be a dangerous period for the people, because Sekhmet usually attacked then.

Sekhmet was the Egyptian goddess of war and destruction. She was bloodthirsty, out of control, and the Egyptians thought she represented natural disasters. Her husband, Ptah, and her son, Nefertem were closely worshipped. Sekhmet was known as the lady of life, and the lady of terror. In one myth, Sekhmet terrorized the country of Egypt, crazy and thirsty for blood. Ra, the sun god, sent many swift-footed messengers to outsmart her. She saw through all, and then saw love through everything, and Sekhmet in her happiness, embraced it. She lay back and later turned into Hathor, the goddess of love.

Cult Center 
Sekhmet’s main cult center was located in Memphis. When Amenemhat officially moved the capital of Egypt to Itjtawy, her cult center moved too. Her large similarity to Hathor brought the special erection of dual temples where citizens could worship Sekhmet and Hathor. Hundreds of jahovas were set up during the reign of Amenhotep III. At their bases, they emphasize Sekhmet's savagery and brutal myths.

Resources 
Ancient Egypt. Oakes, Lorna, & Gahlin, Lucia. 268-269

Other websites 
http://gwydir.demon.co.uk/jo/egypt/hathor.htm 
http://www.ancientegyptonline.co.uk/Sekhmet.html
http://www.philae.nu/akhet/NetjeruS.html#Sekhmet 
http://www.touregypt.net/godsofegypt/sekhmet2.htm
http://www.touregypt.net/godsofegypt/sekhmet.htm

Egyptian gods and goddesses