If they are twitching... they are aggravated/uncomfortable...
If they are rubbing against the ground or objects... they are scratching an ich...
Ick is an itchy parasite... but there are a lot of others too. Most people inaccurately refer to most parasites as "ick". Although it's inaccurate, it isn't critical as (to my knowledge) any cure for ick will address other parasites as well.
I would seek out advice on how to address a parasite infection. I personally prevent parasitic issues using UV lights, but you need a cure not prevention. Others could probably advise you better on this detail than I could.
If they are rubbing against the ground or objects... they are scratching an ich...
Ick is an itchy parasite... but there are a lot of others too. Most people inaccurately refer to most parasites as "ick". Although it's inaccurate, it isn't critical as (to my knowledge) any cure for ick will address other parasites as well.
I would seek out advice on how to address a parasite infection. I personally prevent parasitic issues using UV lights, but you need a cure not prevention. Others could probably advise you better on this detail than I could.