Clinical manifestations of multiple chemical sensitivity (MCS) [1, 6]

Organ systemSymptoms
RespiratoryTachypnea
Sense of suffocating
Dyspnea
Asthma
Bronchospasm
Cough
OtorhinolaryngologicalHyperosmia
Burning eyes—stinging sensation
Laryngeal burning sensation
NeurologicalCephalgia
Migraine
Asthenia
Trembling
Attention deficit
Dizziness
Confusion
Loss of concentration capacity
Sensorial: abnormal perception of odors
Sensorial: visual disturbances
Sensorial: hyperacusis
Insomnia
DermatologicalPruritus
Eczema
Rash
Urticaria/angioedema
Skin photosensitivity
Dermographism
RheumatologicalArthralgia
Myalgia
CardiovascularPalpitations
Arrhythmia
Tachycardia
GastroenterologicalNausea
Abdominal pain
Irritable colon
EndocrinologicalDysthyroidism
Adrenal gland disorders
Pituitary disorders
Psychological/psychiatricAnxiety
Panic attacks
Depression
Bipolar disorder

The bold symptoms represent the most frequent symptoms in MCS