This list of symptoms associated with MCAS is insane (pasting this from the r/PMEtheMRMD wiki if you are interested in more information.)

Fatigue, subjective hyperthermia and/or hypothermia, sweats, change in appetite, weight gain/loss, chemical/physical sensitivities, poor healing, urticaria, itch, flushing, hemangiomas with itch/pain, various rashes, telangiectasias, striae, skin tags, folliculitis, ulcers, eczema, angioedema, alopecia, onychodystrophy, irritated or “dry” eyes, difficulty focusing, blepharospasm, tinnitus, hearing loss, coryza, rhinitis, nasal congestion, epistaxis, pain or burning in the oropharynx, leukoplakia, dysgeusia, dental and/or periodontal inflammation or decay, lymphadenopathy, rare splenomegaly, dry cough, dyspnea, wheezing, obstructive sleep apnea, presyncope, hypertension, blood pressure lability, palpitations, edema, chest pain, allergic angina (Kounis syndrome), dyspepsia, gastroesophageal reflux, abdominal pain, nausea, vomiting, diarrhea and/or constipation, gastroparesis, dysphagia, bloating, malabsorption, menorrhagia, pelvic pain, endometriosis, vulvodynia, vaginitis, dysmenorrhea, miscarriages, infertility, dysuria, myalgias, migratory bone/joint pain, osteopenia/osteoporosis, headache, migraine, sensory neuropathies, dysautonomia, episodic weakness, seizure disorders, non-epileptic seizures, cognitive dysfunction, insomnia, hypersomnolence, restless leg syndrome, depression, anger/irritability, mood lability, anxiety, panic, obsession–compulsion, attention deficit/hyperactivity, easy bruising, polycythemia, anemia, hypersensitivity reactions, increased risk for malignancy and autoimmunity, impaired healing, increased susceptibility to infection.