In Trinidad and To­ba­go, “si­nus” can mean al­ler­gies, a blocked nose, a headache or a cold. Mean­while, some­one of­fers a cough mix­ture that doesn’t work. A co-work­er rec­om­mends an­tibi­otics. An aunt has al­ready put the ket­tle on with a plan for “fever grass” mixed with a dash of al­co­hol.

Colds, in­fluen­za, COVID and al­ler­gies can over­lap, and treat­ing them all alike usu­al­ly wastes mon­ey.

A com­mon cold usu­al­ly de­vel­ops grad­u­al­ly, with a sore throat, run­ny or blocked nose, sneez­ing and a cough. You feel mis­er­able, but most peo­ple be­gin im­prov­ing with­in a week.

In­fluen­za of­ten ar­rives more abrupt­ly. Fever, headache, sub­stan­tial body aches and ex­haus­tion are com­mon. The word “flu” gets at­tached to al­most every snif­fle, but true in­fluen­za can be dead­ly, par­tic­u­lar­ly for vul­ner­a­ble peo­ple at ex­tremes of age or with chron­ic med­ical con­di­tions.

COVID can re­sem­ble ei­ther. It may cause a sore throat, cough, con­ges­tion, fever or fa­tigue.

Los­ing taste or smell is not es­sen­tial for di­ag­no­sis. Symp­toms alone can­not re­li­ably dis­tin­guish it from in­fluen­za.

Al­ler­gies tend to of­fer a dif­fer­ent col­lec­tion of clues: an itchy nose, wa­tery eyes, re­peat­ed sneez­ing and symp­toms that re­cur around a par­tic­u­lar ex­po­sure. Fever and marked body aches sug­gest look­ing be­yond al­ler­gy.

That dis­tinc­tion is use­ful, but a per­son with al­ler­gies can still catch a virus. Dust mites, mould, pollen and an­i­mal dan­der can trig­ger al­ler­gic rhini­tis. Damp walls, dusty cur­tains and bed­ding de­serve at­ten­tion. Smoke and strong fra­grances can al­so ir­ri­tate sen­si­tive air­ways.

Cold air may ir­ri­tate some noses, but a virus is not man­u­fac­tured by a “draft” or the “dew”. Avoid closed, crowd­ed, close-con­tact set­tings.

For most un­com­pli­cat­ed colds, treat­ment is rest, flu­ids and time. Parac­eta­mol can help fever or aches.

Warm drinks may soothe a sore throat. Hon­ey may ease a cough in adults and chil­dren over one year. Nev­er give hon­ey to a ba­by un­der one. Saline nasal drops or spray can help a blocked nose too. Wa­ter safe to drink is not au­to­mat­i­cal­ly suit­able for pour­ing through your nasal pas­sages.

De­con­ges­tants are un­suit­able for peo­ple with high blood pres­sure, heart dis­ease, glau­co­ma, thy­roid prob­lems or cer­tain oth­er con­di­tions. Preg­nan­cy and breast­feed­ing re­quire cau­tion.

De­con­ges­tant nasal sprays are in­tend­ed for short-term use. Pro­long­ing them can pro­duce re­bound con­ges­tion: the spray used to res­cue your nose be­comes part of the rea­son it re­mains blocked.

A suit­able an­ti­his­t­a­mine may help sneez­ing and itch­ing, while a steroid nasal spray can help per­sis­tent nasal in­flam­ma­tion. Some an­ti­his­t­a­mines cause drowsi­ness, dizzi­ness, falls, dry mouth and con­fu­sion.

Then comes the re­quest that doc­tors know well: “Some­thing strong like an an­tibi­ot­ic.”

An­tibi­otics do not treat the virus­es re­spon­si­ble for or­di­nary colds, in­fluen­za or COVID. Sec­ondary bac­te­r­i­al com­pli­ca­tions such as si­nusi­tis, pneu­mo­nia and mid­dle ear in­fec­tions may re­quire their use. Yel­low or green mu­cus does not, by it­self, prove a bac­te­r­i­al in­fec­tion.

An un­nec­es­sary an­tibi­ot­ic can bring di­ar­rhoea, an al­ler­gic re­ac­tion and oth­er com­pli­ca­tions while con­tribut­ing to re­sis­tance. A con­sul­ta­tion that ends with­out one may rep­re­sent care­ful med­i­cine rather than a bad doc­tor.

Old­er adults and peo­ple with con­di­tions such as di­a­betes, chron­ic heart or lung dis­ease, or weak­ened im­mu­ni­ty should seek ad­vice prompt­ly when res­pi­ra­to­ry symp­toms be­gin.

A tod­dler is not a small adult to whom we give a small­er spoon­ful of what­ev­er hap­pens to be in the cup­board. Do not give as­pirin to chil­dren un­der 16 un­less specif­i­cal­ly pre­scribed. Keep feeds and flu­ids go­ing, and watch breath­ing, alert­ness and urine out­put.

A ba­by un­der three months with a tem­per­a­ture of 38°C or high­er needs ur­gent med­ical as­sess­ment. A child strug­gling to breathe, draw­ing in the ribs with each breath, be­com­ing un­usu­al­ly sleepy or drink­ing poor­ly al­so needs prompt at­ten­tion.

Adults should seek emer­gency help for se­vere breath­less­ness, cough­ing blood, per­sis­tent chest pain or pres­sure, con­fu­sion, pro­longed vom­it­ing, de­hy­dra­tion, dif­fi­cul­ty stay­ing awake or blue or grey lips.

A cough last­ing more than three weeks should be as­sessed, es­pe­cial­ly with weight loss, night sweats, wheez­ing or oth­er con­cern­ing symp­toms. Asth­ma, re­flux, med­i­cines and oth­er con­di­tions can cause cough too.

For those who live with asth­ma, keep tak­ing pre­scribed pre­ven­ter treat­ment and fol­low your ac­tion plan. In­creas­ing wheeze, night-time symp­toms or need­ing the re­liev­er more of­ten war­rants re­view.

If you are ill with a res­pi­ra­to­ry in­fec­tion, stay home where pos­si­ble. You can con­sid­er re­turn­ing when symp­toms are im­prov­ing over­all and you have been fever-free for at least 24 hours. Wash your hands, cov­er coughs, con­sid­er N95 mask­ing and post­pone that vis­it to an el­der­ly rel­a­tive.

‘Flu vac­ci­na­tion is par­tic­u­lar­ly im­por­tant for those at greater risk of se­vere dis­ease but does not promise a year with­out every cold.

The aim is to re­cov­er safe­ly, recog­nise trou­ble ear­ly and avoid mak­ing some­body else’s week worse.