Dynamic Trigger update to column

Hello Experts,

I have two tables. Table A with many columns for each Symptom and Table B with one column for Symptom. If the input 'FEVER' is inserted into TableB Symptom column, I would like to set up a trigger which automatically puts a 1 value into Table A's Fever Column. I know I can write an if statement:

If tableB.symptom=FEVER

then insert into tableA.FEVER (-1)

But there can be many symptoms and this if statement would drag on and I'm thinking their is a better way.

How would I go about doing this? Would I use a Stored Procedure?

thanks,

Connor