Diagnosis
If pica is suspected, a medical evaluation is important to assess for possible anemia, intestinal blockages, or potential toxicity from ingested substances. If symptoms are present, the doctor will begin an evaluation by performing a complete medical history and physical exam. The doctor may use certain tests — such as X-rays and blood tests — to check for anemia and look for toxins and other substances in the blood, and to check for blockages in the intestinal tract. The doctor also may test for possible infections caused by eating items contaminated with bacteria or other organisms. A review of the person’s eating habits may be conducted.
Before making a diagnosis of pica, the doctor will evaluate the presence of other disorders — such as intellectual disabilities, developmental disabilities, or obsessive-compulsive disorder — as the cause of the odd eating behavior. This pattern of behavior must last at least one month for a diagnosis of pica to be made.
Allopathic Treatment for Pica
There is NO known treatment for Pica in allopathy.
The Handbook for Clinical Child Psychology currently supports general behavioral strategies as the most effective treatment approach for pica, with training in which foods are edible and which foods cannot be eaten through the use of positive reinforcement.
Homeopathic Treatment for Pica 
There are many medicines in Homeopathy for Pica; here are very few of them:
Sulphur
Difficult thinking. Delusions; thinks rags beautiful things-that he is immensely wealthy. Busy all the time. Childish peevishness in grown people. Irritable. Affections vitiated; very selfish, no regard for others, always irritable, depressed, thin and weak, even with good appetite. Complete loss of, or excessive appetite. Great desire for sweets, Cheese, spicy food, salt etc.
Argentum Nitricum
Likes sweets. Desire for salt, Cheez. Fearful and nervous; impulse to jump out of window. Faintish and tremulous. Melancholic. Incoordination, loss of control and want of balance everywhere, mentally and physically, trembling in affected parts.
Sepia
Likes vinegar, acids, and pickles. Acid dyspepsia with bloated abdomen, sour eructation. Loathes fat. Vertigo. Jerking of head backwards and forwards. Nausea at smell or sight of food.
Crocus Sativus
Hemorrhages that are black and stringy. Tingling in various parts. Chorea and hysterical affections. Frequent and extreme changes in sensations and mental conditions. Anger with violence followed by repentance, Laughing mania. Drowsiness and lassitude; better by literary labor. Vacillating; pleasant mania; sings and laughs. Happy and affectionate; then angry. Sudden changes from hilarity to melancholy. Vivid recollection from music heard.
Flouricum Acidium
wants fancy dishes. Stomach symptoms relieved by tight clothes. Desire for highly seasoned food. Craves cold water, hungry. Warm drinks produce diarrhea.
Lycopodium Clavatum
Dyspepsia due to farinaceous and fermentable food, cabbage, beans, etc. Excessive hunger. Aversion to bread, etc. Desire for sweet things. Food tastes sour. Sour eructation. Great weakness of digestion. Bulimia, with much bloating. After eating, pressure in stomach, with bitter taste in mouth. Wakes at night feeling hungry. Hiccough. Incomplete burning eructation rise only to pharynx there burn for hours. Likes to take food and drink hot. Sinking sensation; worse night.
Nux Vomica 
Thirst but dislike to all drinks. Ravenous hunger after drinking. Craving for raw rice, raw potato, clay, brandy for chalk etc. Loves fates. Hunger, sometimes with dislike to food, or prompt satiety. Tastelessness for all food. After a meal, risings and regurgitations, nausea, inclination to vomit, and vomiting of food, pressure and cramp-like pains in stomach, pressive inflation in epigastrium, colic, pyrosis, head bewildered and painful, uneasiness and hypochondriacal humor, anxiety, vertigo, and syncope, coldness and shivering, with heat in head and face, redness of cheeks, fatigue, and drowsiness.
Veratrum Album
A perfect picture of collapse, with extreme coldness, blueness, and weakness. Cravings for eating ice. Voracious appetite. Thirst for cold water but is vomited as soon as swallowed. Averse to warm food. Hiccough. Copious vomiting and nausea; aggravated by drinking and least motion. Craves fruit, juicy and cold things, ice, salt.
Lac Felinum
Sensation as if tongue were scalded by a hot drink. Redness under tongue, on gums, and whole buccal cavity. Soreness and sensation of ulcers on tongue and roof of mouth. The parts of mouth seem to stick together, requiring an injection of air or saliva to separate them. Loss of taste. Brassy taste in mouth. Salivation, tongue enlarged and serrated at edges by teeth. Small white ulcers covering tongue and whole buccal cavity. Elongation of palate. Very sore mouth. Great desire to eat paper. Constant nervous trembling, especially of hands.
Phosphorus
Excessive craving for cooling things. Longing for acids and spicy things. Hunger after a meal. Bulimia, even at night, with great weakness. The stool occurs soon after eating anything. Persons needing it may also be anemic. Sour regurgitation of food. Pyrosis. Hiccough. Nausea of various kinds, especially in morning or in evening, or else after a meal, Waterbrash. Vomiting of bile or of mucus. GERD. Abdomen hard and distended. Distended abdomen with bilious tendency. Acute yellow atrophy of the liver. Hepatomegaly, with pain. Pain in hepatic region on pressure. Splenomegaly. Burning thirst for cold water. Desire for cold foods, for acidic drinks/food and preference for cold meat, cold food, spicy food, like the cold drink, may be vomited as soon as it becomes warm inside. Hungry soon after a meal; hungry in the night, must eat.
Tarentula Hispanica
Craving for raw food, Opium, bitter, salty, spicy. Loss of appetite with refusal to eat. Violent burning sensation in the abdomen may also attend. Lancinating pain in spleen, with pain in stomach and uterus. Hepatic region painful to touch. Trembling of all limbs. Intense restlessness.
Cicuta 
Violent, strange desires. Craves and relishes eating charcoal and chalk. The sense to differentiate edible things from inedible ones is lost. Along with this there may be abdomen pain, distension and vomiting. Indigestion, with insensibility, frothing at mouth. Flatulence with anxiety and crossness. Rumbling. Distended and painful. Colic with convulsions. Diarrhea in morning, with irresistible desire to urinate. Itching in rectum.
Calcarea Carbonica
Unpleasant taste in the mouth, mostly bitter, or sour, or metallic. Insipidity, or sickly or sour taste of food. Burning or constant thirst, especially for cold drinks, and often with total absence of appetite. Continued violent thirst for cold drinks even at night. Hunger, a short time after having eaten. Bulimia, generally in the morning. Prolonged distaste for meat and hot food. Repugnance to tobacco-smoke; desire for salt things, for wine, cold drinks, and for dainties. Weakness of digestion. After having taken milk, nausea or acid regurgitations. GERD.
Alumina
Abnormal cravings-chalk, charcoal, dry food, tea-grounds. Heartburn; feels constricted. Aversion to meat. Potatoes disagree. No desire to eat. Can swallow but small morsels at a time. Stool: Hard dry, knotty; no desire. Rectum sore, dry, inflamed, bleeding. Itching and burning at anus. Even a soft stool is passed with difficulty. Great straining.
Graphites
Aversion to meat. Sweets nauseate. Hot drinks disagree. Nausea and vomiting after each meal. Morning sickness during menstruation. Pressure in stomach. Burning in stomach, causing hunger. Eructation difficult. Constrictive pain in stomach. Recurrent gastralgia. Bitter or acid taste, with sourness in the mouth and throat. Great thirst in the morning, and after a meal. Immoderate hunger (with acidity of the stomach). Repugnance to cooked food, and to meat: also, to anything saline or saccharine. Weakness of digestion, with drowsiness, headache, pains in the stomach, fulness, and inflation of the abdomen, after a meal.
Nitric Acid
It is another beneficial medicine for cases where desire for lime, chalk, slate or earth is present. Along with these cravings there may be some gastric complaints. In such conditions there may be diarrhea with little stool. The stool may be yellow or green and pass with a lot of gas. Blood or mucus may also pass in the stool.
Arnica Montana
Taste putrid or bitter, or slimy. Bitter taste, esp. in the morning. Thirst for cold water for alcoholic drinks. Thirst for water, or desire to drink, with repugnance to all liquids. Loathing of food-principally milk, meat, broth, and tobacco. Liking for vinegar. Want of appetite, and tongue loaded with a white or yellowish coating. Irritable and plaintive humor, after dinner. Shootings in the region of the spleen, with difficulty of breathing. Pressure in the hepatic region.
Cina
Increase of thirst. Hunger shortly after a meal. Voracity. Bulimia. Aversion of the sucking child to the milk of its mother. Hunger may come on in the middle of the night, as in children, or one may feel hungry a few minutes after a hearty meal. Bitter taste of bread. Vomiting, or diarrhea immediately after eating or drinking, especially drinking. Continual inquietude, with desire for things of all kinds, which are rejected some moments after.
Pulsatilla
Sweetish, acidic, or bitter taste in mouth, and of food, principally meat, bread, butter, beer, and milk, substances which also often appear insipid or cause disgust. Bitter or sour taste in mouth immediately after eating. Food appears either too salt or insipid. Want of appetite and dislike to food. Hunger and desire to eat, without knowing what. Ravenous hunger, with gnawing pain in stomach. Cold in stomach from ice-cream and fruit. Colic, with nausea, ceasing after vomiting.
Silicea
Great appetite; desire for cold drinks and warm food; immediately after eating, appetite and violent thirst returned. Ravenous hunger so that it was difficult to fall asleep. Ravenous hunger before supper, with complete loss of appetite and trembling of all the limbs, followed by chilliness and coldness over whole body, with heat on chest. Ravenous hunger: morning; evening; with collection of water in mouth. Repugnance to all food, especially to cooked and hot things, with desire for cold, raw things only. Aversion to boiled food. Loathing of animal food.
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