at death's door
- very near deathThe Prime Minister was at death's door after suffering a serious stroke.
back on one's feet
- physically healthy againMy mother is back on her feet again after being sick with the flu for two weeks.
- lose consciousness, faintThe football player blacked out after being hit by the other player.
- begin showing a rash or other skin disorderI broke out in a terrible rash after eating the raw shrimp at the restaurant.
breathe one's last
- to dieThe man finally breathed his last after a long illness.
- restore to health or consciousness, cureThe medical workers were able to bring the man around after the accident.
- restore to consciousness, wake from sleep/anesthesia/hypnosis/fainting etcThe woman was brought to soon after the car accident.
catch a cold
- get a coldI caught a bad cold last week and had to miss three weeks of work.
catch one's death of cold
- become very ill (with a cold, flu etc)The little boy was told to be careful in the rain or he would catch his death of cold.
- a periodic inspection of a patient by a doctorI went to have my annual check-up last week.
clean bill of health
- a report or certificate that a person or animal is healthyThe doctor gave me a clean bill of health when I visited him last month.
come down with
- become sick with, catchMy niece came down with a bad cold and was unable to visit me last week.
- a psychoanalyst who puts his patients on a couchHe was sent to see a couch doctor after his continued problems at work.
dose/taste of one's own medicine
- being treated in the same way as one treats others (usually a negative meaning)Our boss got a taste of his own medicine when people began to ignore him as he had always done to them.
- make someone bleed, get blood from someoneThe doctor decided to draw some blood from the patient to check up on his blood sugar level.
- become sick or illThe man fell ill last winter and has not recovered yet.
feel on top of the world
- feel very healthyI have been feeling on top of the world since I quit my job.
- to begin again suddenly (illness etc)My mother's skin problems flared up when she started to use the new laundry soap.
- a sudden worsening of a health conditionHis arthritus usually flares up every winter.
go under the knife
- be operated on in surgeryHis wife went under the knife at the hospital last evening.
hang out one's shingle
- give public notice of the opening of a doctor's office etcThe doctor decided to hang up his shingle as soon as he finished medical school.
have a physical (examination)
- get a medical check-upOur company sent all the employees to have a physical last week.
- a psychiatristThe man was told to go and see a head shrinker after he threatened the woman in the store several times.
just what the doctor ordered
- exactly what is needed or wantedA nice hot bath was just what the doctor ordered.
look the picture of health
- be in good healthMy uncle was looking the picture of health when I saw him last week.
on the mend
- healing, becoming betterMy grandfather is on the mend after he broke his leg last week.
- unconscious, in a faintAs soon as the patient entered the operating room he was out cold because of the anesthesia.
over the worst
- recovering from an illnessMy brother is over the worst since his skiing accident last month.
- recover from a serious illnessThe car accident was very bad and I don't think that the driver will pull through.
run a temperature
- have a higher than normal body temperatureThe little boy is running a temperature and should stay in bed all day.
- get into poor conditionHe was working very hard last month and has become very run down.
run some tests
- a doctor does some medical tests on a patientThe doctor has decided to run some tests on the patient.
- a severe headacheI have been suffering from a splitting headache all morning.
take a turn for the worse
- become sickerMy aunt took a turn for the worse last week and is still in the hospital.
take someone's temperature
- measure someone's body temperatureThe nurse took my temperature when I went to the hospital yesterday.
- vomitThe woman threw up several times after eating the bad shellfish.
under the weather
- not feeling wellMy boss has been feeling under the weather all week and has not come to work during that time.