Blackheads are called blackheads because of their appearance. When a hair follicle becomes clogged with oil and dead skin cells, it creates a plug that is exposed to the air. As this plug is exposed to the air, it oxidizes and turns black, giving it the appearance of a small black dot on the skin. This is why they are called blackheads. **

'Zum' is a preposition in German that means 'to' or 'until', while 'bis zum' means 'until'. The main difference between the two is that 'zum' is used to indicate a destination or endpoint, while 'bis zum' is used to specify a point in time or a deadline. For example, 'Ich gehe zum Supermarkt' means 'I am going to the supermarket', while 'Ich arbeite bis zum Abend' means 'I am working until the evening'. **

To help prevent blackheads, it is important to maintain a consistent skincare routine that includes cleansing the skin twice daily with a gentle cleanser to remove dirt, oil, and dead skin cells. Exfoliating regularly can also help to unclog pores and prevent blackheads from forming. Using products with salicylic acid or benzoyl peroxide can help to control oil production and reduce the appearance of blackheads. Additionally, avoiding heavy or pore-clogging makeup and regularly washing pillowcases and other items that come into contact with the face can also help prevent blackheads. **

Blackheads are typically squeezed by applying gentle pressure around the affected area using the fingers or a blackhead extractor tool. It is important to first cleanse the skin and use a warm compress to open up the pores before attempting to squeeze the blackheads. Care should be taken to avoid excessive force or aggressive squeezing, as this can lead to skin damage and scarring. After squeezing, it is important to cleanse the skin again and apply a soothing, non-comedogenic moisturizer to prevent further breakouts. **

Without more context, it's difficult to determine what "2" refers to in this question. If "2" is meant to indicate a quantity, then the question is asking whether the blackheads are the second occurrence of blackheads. If "2" is meant to indicate a size or type, then the question is asking whether the blackheads are a specific type or size. Without more information, it's unclear what the question is specifically asking. **

"Bis zum Fristen" is a German phrase that translates to "until the deadline" in English. It is used to indicate the specific time or date by which something needs to be completed or submitted. This phrase is commonly used in academic or work settings to emphasize the importance of meeting a deadline. **

"Bis zum 30." is a German phrase that translates to "until the 30th." It indicates a deadline or a specific date by which something should be completed or achieved. For example, if a document is due "bis zum 30. April," it means the document should be submitted by April 30th. **

"Bis zum" is a German prepositional phrase that translates to "until" or "up to" in English. It is used to indicate a specific point in time or a limit in space. For example, "bis zum Ende" means "until the end" and "bis zum Bahnhof" means "up to the train station." **