Twenty-one words, two couplets, and one title that quietly changes the meaning of everything under it. "Invalid" can be read two ways. Stress the first syllable and it is a person made weak by illness. Stress the second and it means "not valid", something cancelled or no longer counting. On the page the word doesn't say which it means, so both readings hang over the poem. The speaker is a sick person, but the poem also hints at someone whose ordinary standing has been revoked.
The first couplet is all body. "In the morning of my disease" borrows the shape of familiar phrases about the "morning of life", the bright beginning of things, and then attaches it to illness. Disease gets a dawn, as if it were a day with its own stages, and this is the start of it. The word itself is worth a second look: "disease" is literally "dis-ease", the loss of ease, and the line makes you hear that. Then comes the abrupt, almost comic drop: "I itch and pimple." The verb "pimple" is the surprise. Pimples are normally a noun, a thing you have, but here the speaker does the pimpling, as though the skin has taken over the grammar. The short, scratchy "i" sounds in "itch" and "pimple" (and in the earlier "in") make the line prickle in the mouth. After the stately first line, the second shrinks to the size of an irritation. The suggestion, which is an inference from the imagery, is of a rash-type illness, undignified and physical, possibly the kind we associate with childhood. The poem never says so, and it doesn't need to.
The second couplet changes the whole mood. The speaker, who was the subject of the first couplet's verbs, shrinks to the object of someone else's: "sickness came for me." Now sickness is the one who acts. The phrase "came for me" has a faintly legal or sinister ring, like a summons or an arrest, and it contrasts sharply with the clumsy itching of a moment earlier. Sickness is also personified, and the poem gives it a costume: "a pair / of plain white gloves." White gloves suggest a butler, a magician, a surgeon, a pallbearer. Each is polite and precise, and each is faintly ominous. Gloves also leave no fingerprints, so this visitor arrives clean, courteous and untraceable. The word "plain" matters. It strips out any drama and makes the visitation feel ordinary, even bureaucratic, which is somehow more unsettling than a skull or a scythe.
The line break does quiet work too. "In a pair" ends the line, and the pair of gloves is then handed over the break to the next line, so the phrase is literally split in two. Where the first couplet has uneven, jittery lines, the last line, "of plain white gloves", lands on three heavy beats in a row, almost like someone slowly pulling a glove on, finger by finger. There is no rhyme anywhere. The poem avoids the neat chime that would make illness feel tidy or finished, and it uses no punctuation or capital letters, so the two couplets simply sit side by side. The reader has to supply the connection between the itching and the visitor.
That gap is where the poem's central idea lives. Illness is felt in two registers at once. From the inside it is ugly, itchy and absurd. From a little further back it looks like an elegant, impersonal arrival, something that was always going to knock. The poem doesn't choose between them, and that is what the title's double meaning has been telling us from the start. A person can be an "invalid" in both senses at once, a body that itches and a self that has been quietly overruled.
What makes the poem worth reading is how much it does with so little. It compresses a whole experience into two images, one bodily and one ceremonial, and lets the contrast between them create the tension. It is funny in its second line and chilling in its fourth, and the single word "pimple" and the single adjective "plain" do most of the work.