Abnormally sensitive means being more responsive or reactive to stimuli than what is typical or expected. There are many synonyms for this expression, including hypersensitive, reactive, heightened, hyper-vigilant, and touchy. Other synonymous terms that can be used are delicate, easily affected, over-responsive, susceptible, reactive, over-sensitive, and tenderhearted. Emotionally sensitive, fragile, delicate, and nervous are also usable synonyms. These terms can be used to describe a person who is easily upset or overwhelmed by their own emotions or external factors. Such people may require extra support and care from others to avoid emotional burnout. By using appropriate synonyms, one can vary the language and give a more precise picture of the situation.