Regardless of their location, blackheads are the result of enthusiastic sebaceous glands. These glands produce oil. Sometimes our pores get plugged with sebum, which is secreted from these glands. That, along with dead skin cells, which can harden inside of our pores, results in blackheads.
If you have blackheads on your face, you may also have them in your ear. The only difference is that they will be more difficult to detect and treat due to their location. According to Acne Talks, blackheads, whether they are on your face or in your ear, are considered open comedones, which are caused by excessive oil, which then accumulates and makes the bump (see link in References). A blackhead can be black in colour, obviously, or a yellowish-black. Blackheads develop for any number of reasons including genetics, hormones, oil-based cosmetics, medications, environmental pollutants, stress and/or physical irritation, according Acne Resource (see link in References).
Difficult to Remove
Ear blackheads will be more difficult to remove so your best course of action is to have a dermatologist perform the extraction for you. A physician can use an extractor tool to remove the ear blackhead without doing permanent damage to the surrounding tissue.
Regardless of whether your blackhead is in your ear or on your face or nose, it contains keratin and sebum, the latter darkening as it oxidises, which causes the dark colour of the blackhead.
Facial oils, particularly if you have oily skin (which includes the skin in your ears), can drain into the pores and clog them, resulting in blackheads. Oil glands and hair follicle openings can also get clogged, resulting in blackheads (see link in Resources). If you are dehydrated or are not keeping your skin clean, this can cause blackheads in your ears as well as on your face, according to Ayushveda (see link in Resources). In addition, blackheads can be the result if you have a thyroid problem (hypothyroidism, which means underactive thyroid), anaemia (iron-poor blood), constipation or indigestion.
If you wish to proceed on your own, or with the help of an "assistant," blackheads may be removed by gentle squeezing or using an exfoliant and scrubbing the inside of your ear. Your ear is sensitive; proceed with caution. Healing Natural Remedies.com notes that ear blackheads can be especially painful, so to keep a gentle touch when removing them. If you are aware that an ear blackhead, or any blackhead, is developing, begin treatment before it changes from yellow to black. Once it turns black, it is harder to remove and can result in scarring if you are too aggressive in your attempt to remove it.