A stye, also known as a hordeolum, is a bacterial infection of an oil gland in the eyelid. This results in a red tender bump at the edge of the eyelid. The outside or the inside of the eyelid can be affected.The cause of a stye is usually a bacterial infection by Staphylococcus aureus. The internal ones are due to infection of the meibomian gland while the external ones are due to an infection of the gland of Zeis. A chalazion on the other hand is a blocked oil gland without infection. A chalazion is typically in the middle of the eyelid and not painful.Often a stye will go away without any specific treatment in a few days or weeks. Recommendations to speed improvement include warm compresses. Occasionally antibiotic eye ointment may be recommended. While these measures are often recommended, there is little evidence for use in internal styes. The frequency at which styes occur is unclear, though they may occur at any age. Signs and symptoms
The first sign of a stye is a small, yellowish spot at the center of the bump that develops as pus and expands in the area.Other stye symptoms may include:

A lump on the top or bottom eyelid
Localized swelling of the eyelid
Localized pain
Redness
Tenderness
Crusting of the eyelid margins
Burning in the eye
Droopiness of the eyelid
Scratchy sensation on the eyeball (itching)
Blurred vision
Mucous discharge in the eye
Irritation of the eye
Light sensitivity
Tearing
Discomfort during blinking
Sensation of a foreign body in the eye

Complications
Stye complications occur in very rare cases.
A syphilid is any of the cutaneous and mucous membrane lesions characteristic of secondary and tertiary syphilis.It appears about 10 weeks after infection. Patient may present with prodromal symptoms such as fever, acratia, myalgia arthralgia, headache, anorexia. Its eruption pattern is macular, papular,  follicular papules, or pustule, symmetrical, generalized and dense, round or oval in shape, and is red copper in color. See also
Id reactions
List of cutaneous conditions


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