“Explore our comprehensive A-Z guide on diseases and conditions. Discover detailed information on definitions, symptoms, causes, and treatments to better understand various health issues.”
- Paget’s Disease of the Bone
- Paget’s Disease of the Breast
- Pallor
- Pancoast Tumor
- Pancreas Divisum
- Pancreatic Cancer
- Pancreatic Cysts
- Pancreatic Neuroendocrine Tumors
- Pancreatic Pseudocysts
- Pancreatitis
- Pancytopenia
- PANDAS Syndrome
- Panhypopituitarism
- Panic Attacks And Panic Disorder
- Paper Wasp Sting
- Papillary Fibroelastoma
- Papillary Thyroid Cancer
- Papilledema
- Papyrophobia (Fear of Paper)
- Paraganglioma
- Paragonimiasis
- Parainfluenza
- Paralysis
- Paralytic Ileus
- Paraneoplastic Syndromes
- Paranoid Personality Disorder
- Paranoid Schizophrenia
- Paraovarian Cyst
- Paraphimosis
- Paraquat Poisoning
- Parasites
- Parasitic Infection
- Parasitic Twin
- Parasomnias And Disruptive Sleep Disorders
- Parathyroid Adenoma
- Parathyroid Cancer
- Parinaud Oculoglandular Syndrome
- Parkinson’s Disease
- Parkinson’s Disease Dementia
- Parkinsonism
- Parosmia
- Parotid Gland Tumor
- Parotitis
- Paroxysmal Hemicrania
- Paroxysmal Nocturnal Hemoglobinuria
- Paroxysmal Supraventricular Tachycardia (PSVT)
- Parsonage-Turner Syndrome
- Partial Anomalous Pulmonary Venous Return
- Partial Molar Pregnancy
- Parvovirus B19 Infection
- Patella Fracture
- Patellar Dislocations
- Patellar Instability
- Patellar Tendinitis (Jumper’s Knee)
- Patellofemoral Pain Syndrome (PFPS)
- Patent Ductus Arteriosus (PDA)
- Patent Foramen Ovale (PFO)
- Pathologic Fracture
- Peanut Allergy
- Pearly Penile Papules
- Pectus Carinatum
- Pectus Excavatum
- Pediatric and Adolescent Scoliosis
- Pediatric Multiple Sclerosis
- Pediatric Somatic Symptom Disorder
- Pediatric Stroke
- Pedophobia
- Pelizaeus-Merzbacher Disease
- Pellagra
- Pellucid Marginal Degeneration
- Pelvic Congestion Syndrome
- Pelvic Floor Dysfunction
- Pelvic Fractures
- Pelvic Inflammatory Disease
- Pelvic Organ Prolapse
- Pemphigus
- Pemphigus Foliaceus
- Pemphigus Vulgaris
- Pendred Syndrome
- Penicillin Allergy
- Penile Adhesions and Skin Bridges
- Penile Cancer
- Penile Curvature
- Penile Disorders
- Penile Fracture
- Penile Torsion
- Penis Health
- Peptic Ulcer Disease
- Perianal Abscess
- Periapical Abscess
- Pericardial Conditions
- Pericardial Cyst
- Pericardial Effusion
- Pericarditis
- Perichondritis
- Pericoronitis
- Perilymphatic Fistula
- Perimenopause
- Perineal Hernia
- Periodic Limb Movements of Sleep (PLMS)
- Periodontal Abscess
- Periodontal Disease (Gum Disease)
- Periodontitis
- Perioral Dermatitis
- Periorbital Cellulitis
- Peripartum Cardiomyopathy
- Peripheral Artery Disease
- Peripheral Neuropathy
- Peripheral T-cell Lymphoma (PTCL)
- Peritoneal Mesothelioma
- Peritonitis
- Peritonsillar Abscess
- Periventricular Leukomalacia (PVL)
- Pernicious Anemia
- Peroneal Nerve Injury
- Peroneal Tendon Tear
- Peroneal Tendonitis
- Persistent Atrial Fibrillation
- Persistent Depressive Disorder (PDD)
- Persistent Genital Arousal Disorder
- Persistent Postural-Perceptual Dizziness
- Persistent Pulmonary Hypertension in the Neonate (PPHN)
- Persistent Pupillary Membrane
- Personality Disorders
- Pervasive Developmental Disorder
- Pet Allergies
- Peutz-Jeghers Syndrome
- Peyronie’s Disease
- Pfeiffer Syndrome
- PHACE Syndrome
- Phantom Limb Pain
- Phantosmia (Olfactory Hallucinations)
- Phelan-McDermid Syndrome
- Phenylketonuria (PKU)
- Pheochromocytoma
- Philophobia
- Phimosis
- Phlegmasia Cerulea Dolens
- Phobias
- Phobophobia
- Phonological Disorder
- Photokeratitis
- Phthisis Bulbi
- Phyllodes Tumors
- Pica
- Pick’s Disease
- Pierre Robin Syndrome
- Pigeon Toes
- Pigment Dispersion Syndrome and Pigmentary Glaucoma
- Pilar Cyst
- Pilocytic Astrocytoma
- Pilon Fractures
- Pilonidal Cysts
- Pimple on Vagina
- Pimples
- Pinched Nerve
- Pineoblastoma
- Pinguecula
- Pink Eye (Conjunctivitis)
- Pinta
- Pinworms
- Piriformis Syndrome
- Pitt-Hopkins Syndrome (PTHS)
- Pitted Keratolysis
- Pituitary Adenomas
- Pituitary Apoplexy
- Pityriasis Alba
- Pityriasis Rosea
- Placenta Accreta
- Placenta Previa
- Placental Abruption
- Placental Insufficiency
- Plagiocephaly
- Plague
- Plantar Fasciitis
- Plantar Fibroma
- Plantar Warts
- Plaque Psoriasis
- Plasma Cell Leukemia
- Plasmacytoma
- Pleomorphic Adenoma
- Pleural effusion
- Pleural Mesothelioma
- Pleurisy
- Pleurodynia
- Plica Syndrome
- Pneumococcal Disease
- Pneumomediastinum
- Pneumonia
- Pneumonitis
- Pneumothorax
- Podophobia
- POEMS Syndrome
- Pogonophobia
- Poikilocytosis
- Poikiloderma of Civatte
- Poison Hemlock
- Poison Ivy, Poison Oak and Poison Sumac
- Poisoning
- Polio
- Pollen Allergy
- Polyarteritis Nodosa (PAN)
- Polyarthritis
- Polychromasia
- Polyclonal Gammopathy
- Polycystic Kidney Disease
- Polycystic Ovary Syndrome (PCOS)
- Polycythemia Vera
- Polydactyly
- Polyhydramnios
- Polymorphous Light Eruption (PMLE)
- Polymyalgia Rheumatica
- Polymyalgia Rheumatica (PMR) and Giant Cell Arteritis (GCA)
- Polymyositis
- Polysubstance Use Disorder
- Pompe Disease
- Pontiac Fever
- Pontine Stroke
- Poor Circulation
- Popcorn Lung (Bronchiolitis Obliterans)
- Popliteal Aneurysm
- Popliteal Artery Entrapment Syndrome (PAES)
- Porencephaly
- Porphyria
- Porphyrophobia
- Port Wine Stain
- Portal Hypertension
- Portal Vein Thrombosis
- Positional Headache
- Post-Concussion Syndrome
- Post-Gastrectomy Syndrome
- Post-Intensive Care Syndrome (PICS)
- Post-Polio Syndrome
- Post-Thrombotic Syndrome
- Post-Transplant Lymphoproliferative Disorders (PTLD)
- Post-Traumatic Arthritis
- Post-Vasectomy Pain Syndrome
- Posterior Capsular Opacification
- Posterior Cortical Atrophy
- Posterior Cruciate Ligament (PCL) Injury
- Posterior Tibial Tendon Dysfunction (PTTD)
- Posterior Urethral Stenosis
- Posterior Urethral Valves
- Posterior Vitreous Detachment
- Postherpetic Neuralgia
- Posthitis
- Postictal State
- Postmenopausal Bleeding
- Postmenopause
- Postnasal Drip
- Postpartum Acne
- Postpartum Anxiety
- Postpartum Depression
- Postpartum Hair Loss
- Postpartum Headache
- Postpartum Hemorrhage
- Postpartum Preeclampsia
- Postpartum Psychosis
- Postpartum Rage
- Postpartum Thyroiditis
- Postprandial Hypotension
- Postural Orthostatic Tachycardia Syndrome (POTS)
- Pott’s Disease
- Pott’s Puffy Tumor
- Potter Syndrome
- Pouchitis
- Powassan Virus
- Prader-Willi Syndrome
- Precocious Puberty/Early Puberty
- Precordial Catch Syndrome
- Prediabetes
- Preeclampsia
- Pregnancy and Bladder Control
- Pregnancy Constipation
- Pregnancy Gingivitis
- Pregnancy Insomnia
- Pregnancy Rhinitis
- Prehypertension
- Premature and Early Menopause
- Premature Atrial Contractions
- Premature Ejaculation
- Premature Junctional Contraction
- Premature Rupture of Membranes
- Premature Ventricular Contractions
- Premenstrual Dysphoric Disorder
- Premenstrual Syndrome
- Prenatal Depression
- Prepatellar Bursitis
- Presbycusis
- Presbyopia
- Presumed Ocular Histoplasmosis Syndrome
- Presyncope
- Preterm Birth
- Preterm Labor
- Pretibial Myxedema
- Priapism
- Primary Aldosteronism (Conn’s Syndrome)
- Primary Biliary Cholangitis
- Primary Ciliary Dyskinesia
- Primary Hypertension
- Primary Immunodeficiency
- Primary Intestinal Lymphangiectasia
- Primary Lateral Sclerosis
- Primary Ovarian Insufficiency
- Primary Peritoneal Cancer
- Primary Progressive Aphasia
- Primary Progressive Multiple Sclerosis (PPMS)
- Primary Sclerosing Cholangitis
- Prinzmetal Angina
- Prion Disease
- Proctalgia Fugax
- Proctitis
- Progeria
- Prognathism
- Progressive Multifocal Leukoencephalopathy (PML)
- Progressive Supranuclear Palsy
- Prolactinoma
- Prolapsed Stoma
- Prolonged Labor
- Proptosis
- Prosopagnosia
- Prostate Cancer
- Prostatitis
- Protein C Deficiency
- Protein S Deficiency
- Proteinuria
- Proteus Syndrome
- Prothrombin Gene Mutation
- Prune Belly Syndrome
- Prurigo Nodularis
- Prurigo of Pregnancy
- Pruritus
- Pseudoachondroplasia
- Pseudoaneurysm
- Pseudobulbar Affect (PBA)
- Pseudobulbar Palsy
- Pseudocholinesterase Deficiency
- Pseudocyesis
- Pseudogout
- Pseudohypoparathyroidism
- Pseudomembranous Colitis
- Pseudomonas Aeruginosa Infection
- Pseudomyxoma Peritonei (PMP Cancer)
- Pseudotumor Cerebri
- Psittacosis
- Psoas Syndrome
- Psoriasis
- Psoriasis in the Ears
- Psoriasis on the Eyelids
- Psoriasis on the Face
- Psoriasis on the Hands and Feet
- Psoriatic Arthritis
- Psychogenic Nonepileptic Seizure (PNES)
- Psychosomatic Disorder
- PTEN Hamartoma Tumor Syndrome
- Pteridophobia
- Pterygium (Surfer’s Eye)
- Ptosis (Droopy Eyelid)
- PTSD (Post-Traumatic Stress Disorder)
- Pubic Lice (Crabs)
- Pudendal Neuralgia
- Pulled Calf Muscle
- Pulmonary Alveolar Proteinosis
- Pulmonary Arterial Hypertension
- Pulmonary Artery Stenosis
- Pulmonary Atresia
- Pulmonary Contusion
- Pulmonary Edema
- Pulmonary Embolism
- Pulmonary Embolism: Who Is At Risk?
- Pulmonary Fibrosis
- Pulmonary Hypertension
- Pulmonary Hypoplasia
- Pulmonary Nodules
- Pulmonary Sarcoidosis
- Pulmonary Valve Disease
- Pulmonic Valve Regurgitation
- Pulp Necrosis
- Pulpitis
- Pulsatile Tinnitus
- Pulseless Ventricular Tachycardia
- PUPPP Rash
- PURA Syndrome
- Pure Autonomic Failure
- Pure Red Cell Aplasia (PRCA)
- Pustular Psoriasis
- Pyelectasis
- Pyloric Stenosis
- Pyoderma Gangrenosum
- Pyogenic Granuloma
- Pyomyositis
- Pyospermia
- Pyrophobia
- Pyruvate Kinase Deficiency
- Pyuria