headache
fever
diarrhoea / the runs
stomach ache = vatsakipu
stomach flu = vatsatauti
cough = yskä
sore throat = kipeä kurkku
cold = flunssa
I have a cold = minulla on flunssa
I have runny nose = nenä vuotaa
flu = influenssa
wound = haava
bruise = mustelma, ruhje
broken leg = I broke my leg
twisted leg = I twisted my leg
heart attack = sydänkohtaus
I have pain in my wrist
My wrist hurts.
rash = ihottuma

Giving advice
You should drink some.... = sinun pitäisi
If I were you, I would drink some water

plaster = bandaid = laastari
bandage = side haavaan
stiches = tikit
cast = kipsi murtuneessa raajassa 
lozenges = kurkkupastilli
cough syrup= yskänlääke

hip replacement = tekonivel lonkassa
artificial joint = tekonivel

pacer = sydämen tahdistin