Grammatical rules would say to place a period (or a question mark or an exclamation point) after sentences of any length, even of one word and even if they don't qualify as a complete sentence.
Period after a single word
Sometimes a single word can form the sentence. In this case you place a fullstop after the word as you would in any other sentence. This is often the case when the subject is understood as in a greeting or a command.
“We've agreed that putting a period after a one-word response in a text conveys something like abruptness, annoyance, negativity.” These findings held true with positive (“yeah” or “yup”), neutral (“maybe” or “alright”) or negative (“nope” or “nah”) responses.
Sentences. If a sentence is either declarative or imperative, place the period directly after the final word. It's customary to leave a single space after a period before beginning a new sentence.
The period is used to end all sentences except those that are direct questions or exclamations.
menses. the monthly flow of blood from a woman's body. The usual word for this is period.
The punctuation is polite when speaking to someone older than you or above you at work, but off-putting among friends. Simply put, the inclusion of a formality in casual communication is unnerving.
A period (.) in texting signifies the end of a sentence, as usual. However, you are probably here wondering what a period by itself means. When someone sends you a message containing only a . (period), it usually means that they acknowledge what you said, or even agree with you.
An ellipsis ( ... ) consists of three evenly spaced periods and is used to indicate the omission of words or suggest an incomplete thought.
The term ellipsis comes from the Greek word meaning 'omission,' and that's just what it does: an ellipsis shows that something has been left out. You can use an ellipsis when you're quoting someone to show that you've omitted some of their words.
To use a period is to abruptly raise the flag of finality in a hitherto positive conversation. “It's the juxtaposition of those things,” McCulloch suggested to the BBC, “which creates that sense of passive aggression.” It's not always intentional.
Ellipsis points are periods in groups of usually three, or sometimes four. They signal either that something has been omitted from quoted text, or that a speaker or writer has paused or trailed off in speech or thought.
Abbreviations/Acronyms
Abbreviations and acronyms are used to save space and to avoid distracting the reader. Acronyms that abbreviate three or more words are usually written without periods (exception is U.S.S.R.).
In the English-speaking world, a punctuation mark identical to the full stop is used as the decimal separator and for other purposes, and may be called a point. In computing, it is called a dot. It is sometimes called a baseline dot to distinguish it from the interpunct (or middle dot).
The ellipsis, a row of three dots, stands for an omitted section of text. But much can be conveyed by omission. It asks the receiver of the message to fill in the text, and in that way is very coy and potentially flirty.
When used in casual conversation, ellipses connote hesitation, confusion, and apathy — they're the most passive-aggressive of all the punctuation marks.
If you're texting or messaging someone and you see the ellipsis symbol pop up (often with 3 dancing or flashing dots), it means the other person is typing a new message.
To show time passing without anything being said they put in dots. If I send you a single dot in an SMS or chat it means, I'm here. I'm reading.
Texting Is Its Own Language
So the recipient is forced to guess your tone based on cues — and punctuation is one of the main ways they do that. A period or full stop is used to mark the end of an idea, so in texting a period can be like slamming a door in someone's face — it implies that the conversation is closed.
In texting, 4 dots (….) are used to express disbelief or a lack of response to a silly or outrageous statement.
When used in the right context and with the right tone, one-word responses can be perfectly acceptable. However, they are usually seen as rude or dismissive if the other person feels that their question is not being answered properly.
Passive-aggressive text messaging is a type of communication where the sender disguises their true feelings or intentions through indirect, ambiguous, or sarcastic language. The messages are often meant to convey disapproval, frustration, or anger.
Approach talking about your period with your employer in the same way you would talk about any other health issue. Keep it professional, appropriate and don't feel like you need to go into a huge amount of detail to justify yourself.